What colour is blood?

[James!]

Just a quick question, what colour is blood before it comes out? I got told it was dark blue..

[luke-p]

Nope, Red =]

[Topjak]

Its more of a reddish purple, haemoglobin goes a deep red when it comes in contact with oxygen so before it does its pretty mucha dull red/purple.

[ssricky]

it is blue in the veins when it comes in contact with oxygen it turns red thats like grade 9 chem u learn that :\

[[Chris]]

its usually blue when its got no oxygen (look at the veins on your wrist)

and when it comes in contact with air/ oxygen it turns red

[Starburst..x]

Its not true that your blue is blue before it comes into contact with oxygen, its always a red-ish colour

[brodeo]

I am wrong. Oops.

Da cleva man bel0 noez it all
\/ \/ \/ \/ \/ \/ \/ \/ \/ \/ \/ \/

[Mentor]

Exsactly the same colour as when it comes out, a darkish red. The vains only seem blue threw your skin becuse of the coulor of the vessle not the blood, and its only used in diagrams to make it clearer "/

[Bef]

Exsactly the same colour as when it comes out, a darkish red. The vains only seem blue threw your skin becuse of the coulor of the vessle not the blood, and its only used in diagrams to make it clearer "/

I trust his awnser the most, he's like, the forum genius <333

[cocaine]

It's the plasma isnt it?

[brodeo]

I trust his awnser the most, he's like, the forum genius <333

Ye i'd rather dismiss my own answer than defy mentor.

[joshspk4]

when its in the veins its blue normally its red/darkred.

[Uwe]

Blood is only blue when no oxygen is reaching it. So when in your body it is always red ^^
I think. :P

[RedStratocas]

Its always red. Veins are blue but the blood is still red.

Blood is red because blood cells are red, and blood cells never change color.

[Bef]

Ye i'd rather dismiss my own answer than defy mentor.

I hope that wasn't sarcasm...

[Acidulantes]

The red blood cells are only in your blood coming out of the heart... in arteries... when the blood is being pumped back into the heart they are goin thru veins, after theyve dropped off the oxygen to different parts of your body. so veins are blue and the blood inside is blue but in arteries they are red and always are...

[Machine Head]

I trust his awnser the most, he's like, the forum genius <333

No :rolleyes::rolleyes:

Nixt (Forum Moderator) Please stick to the thread topic and do not post pointleslly.

[foxyfox00]

Its red sometimes dark red.
I got a blood test and thats what colour it was.
Also if its not blue because in hospitals they inject blue/black dye into peoples veins and arteries to see if they are blocked. And if your blood was blue why would they use they same colour dye?

[!clarissax]

red, put your hand up to a light and it glows through red.

[Ostinato]

When blood is inside your body, it is blue - hence why your veins are that dark blue/purplish colour. It's blue as there's no oxygen, and therefore no haemoglobin.

When your blood is out of your body - say you had a cut - it meets with oxygen, and the present haemoglobin causes it to turn the redish colour you would always expect it to be.

It's a scientificly proven fact, that blood is blue when not in contact with oxygen (in the body).

[Nixt]

Quoted from Wikipedia:

"In humans and other haemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart."

[shenk.]

with oxygen - Red.
without oxygen - Blue.

Look at your veins&archerys for evidence :rolleyes:

[GommeInc]

with oxygen - Red.
without oxygen - Blue.

Look at your veins&archerys for evidence :rolleyes:
Look at the post before yours :rolleyes:

It is light red when it is exposed to oxygen and a darker red when it is deoxygenated. Blood cells don't change colour, they stay the same colour of red, they only change shade "/

Your example is very bad. I can use it for this:

"People are grey. Look through the windows of a car with tinted windows. That is evidence."

People are blood. Windows are the veins. The car is the body.

Figure it out.

I would like to tell everyone using the blood test example that they are idiots. They take blood out of your veins, not arteries, they are far too small and not good for your health to be pumped straight out of. When they take out your blood from a test, it is a dark red. Please, no one say it is that colour because it has been oxygenated, that is very untrue, because if there is air in needle at the time, you would possibly have a heart attack "/

Also, look at the colour of your skin, it is pink. A good place to look is the palm of your hand. In winter your skin goes pale, or when youa re cold even because the blood retreats back into the middle of your limbs.

[Charlie]

It's the plasma isnt it?

I swear plasma is a yellowy colour? And has nothing to do with blood, i thought that plasma was other things that weren't carried in the blood cells?

[Nixt]

I swear plasma is a yellowy colour? And has nothing to do with blood, i thought that plasma was other things that weren't carried in the blood cells?



Plasma is clear with a very faint straw sort of colour, it is just shown as Yellow on alot of diagrams... And it has EVERYTHING to do with blood :) Let me explain:
Basically, blood plasma is the liquid part of the blood where all the other cells are found. As well as this, it contains Serum, which is the form of Blood Plasma which causes the clots when you cut yourself or something.. otherwise it would just bleed and bleed.


Plasma is clear with a very faint straw sort of colour, it is just shown as Yellow on alot of diagrams... And it has EVERYTHING to do with blood :) Let me explain:
Basically, blood plasma is the liquid part of the blood where all the other cells are found. As well as this, it contains Serum, which is the form of Blood Plasma which causes the clots when you cut yourself or something.. otherwise it would just bleed and bleed.

EDIT;; Sorry, I accidentally edited your post rather than quoting it >.<

[GommeInc]

You could just say when you cut yourself you can sometimes see a nearly clear sort of liquid forming over the wound.

[Ostinato]

Quoted from Wikipedia:

"In humans and other haemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart."

Just because something appears on Wikipedia, doesn't mean it's a proven fact.

Wikipedia allows users to add their own entrys and opinions, so just because you got it from there in no way means it's correct.

I still stick by my original hypothosis, that de-oxygenated blood is blue, and oxygenated blood is red.

[Pizza]

Quoted from Wikipedia:

"In humans and other haemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart."

i agree with nixt, even after what everyone else has said. also, when you donate blood your blood doesnt contact oxygen, and its red?

[GommeInc]

So you are going to purposely stick by your own ignorance? What proof do you have? What evidence? The colour of the vein itself means nothing as you probably already know...

And wikipedia does allow people to edit entries, but they are moderated as far as I am aware and considering this is a pretty self-explainatory subject and loads of smart people use wikipedia, it would be correct :rolleyes:


i agree with nixt, even after what everyone else has said. also, when you donate blood your blood doesnt contact oxygen, and its red?
Precisely, and if it did contain oxygen, when they put it back into someone elses body, or your own, they aren't going to be the healthiest people in the world. Oxygenated blood that has been oxygenated again would give someone a heart attack...

[Pizza]

actually.. im not sure, when i googled it half the pages said its blue, half said red soo...

arghhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhh

actually i think its red now

[Billy♥]

i heard its white

[Pizza]

i heard its white

are u just trying to confuse things even more or what??

[shenk.]

Tell you what, Its impossible to 100% prove so meh lol.

Even if you took all of the oxygen out of the air and slip yout wrists... still wouldent be great proof...

Its like saying that the earths center is filled with moltern iron as it has the same mass... But... no one acctually knows...

Or that every bonage of chemicals have been found through lab-bonding but you can't PROVE that ether.

The world is a lie. :rolleyes:.

[Nixt]

Just because something appears on Wikipedia, doesn't mean it's a proven fact.

Wikipedia allows users to add their own entrys and opinions, so just because you got it from there in no way means it's correct.

I still stick by my original hypothosis, that de-oxygenated blood is blue, and oxygenated blood is red.


I never said it was definite, you can't actually trust anything you see on any site, though Wikipedia is often correct and provides accurate information.
There are many things that back this up:

"The color of blood never actually is blue. When it is in the oxygen poor stage is does assume a red color that is not as intense as the red of the oxygen rich stage. When viewed through the skin this darker shade of red does appear to have a blueish color." SOURCE (http://www.seps.org/oracle/oracle.archive/Life_Science.Anatomy/2003.04/001049724194.15246.html)

"Blood gets its bright red color when haemoglobin in red blood cells picks up oxygen in the lungs." - i.e when it is still in the body. SOURCE (http://www.kidshealth.org/parent/general/body_basics/blood.html)

There are more.. I can provide you with more if you wish. But it seems that Blood is always red, though just darker (almost purple) while within the veins.

[GommeInc]

I never said it was definite, you can't actually trust anything you see on any site, though Wikipedia is often correct and provides accurate information.
There are many things that back this up:

"The color of blood never actually is blue. When it is in the oxygen poor stage is does assume a red color that is not as intense as the red of the oxygen rich stage. When viewed through the skin this darker shade of red does appear to have a blueish color." SOURCE (http://www.seps.org/oracle/oracle.archive/Life_Science.Anatomy/2003.04/001049724194.15246.html)

"Blood gets its bright red color when haemoglobin in red blood cells picks up oxygen in the lungs." - i.e when it is still in the body. SOURCE (http://www.kidshealth.org/parent/general/body_basics/blood.html)

There are more.. I can provide you with more if you wish. But it seems that Blood is always red, though just darker (almost purple) while within the veins.

Precisely, I suggest everyone goes to their nearest hosptial and have a blood test. It is a dark red. You cannot say it has been oxygenated in the test because there is no oxygen inside a needle... Because if there was, it won't be good if it enters the body...

[Josh-H]

The red blood cells are only in your blood coming out of the heart... in arteries... when the blood is being pumped back into the heart they are goin thru veins, after theyve dropped off the oxygen to different parts of your body. so veins are blue and the blood inside is blue but in arteries they are red and always are...


Theres your answer people.

[GommeInc]

Theres your answer people.
That is very false.

[Nixt]

Theres your answer people.

Nope. It is just a deeper red, almost purple colour, when it is passing through veins.

[Ostinato]

Precisely, I suggest everyone goes to their nearest hosptial and have a blood test. It is a dark red. You cannot say it has been oxygenated in the test because there is no oxygen inside a needle... Because if there was, it won't be good if it enters the body...

There is oxygen in the needle. It has been in contact with oxygen and therefore when it contacts the blood, the blood inside the needle turns red.

Nixt, you say blood is a 'dark red/purple' colour - therefore, in some peoples eyes the blood is purple, whereas others would call this purple - blue.

[GommeInc]

http://www.opticsnotes.com/sciopticsfaq/veins.htm

Read that it, it makes quiet alot of sense to me. I sure hope you don't think you are his simple minded younger brother...

[Nixt]

There is oxygen in the needle. It has been in contact with oxygen and therefore when it contacts the blood, the blood inside the needle turns red.

What you are saying is that oxygenated blood is red, deoxygenated blue. Okay, so, the needle will have been in contact with Oxygen, but not nearly enough to Oxygenate the amount of blood that comes from your veins.. if there was enough, it would be dangerous, and would cause a heart attack as well as oxygenating the blood.



Nixt, you say blood is a 'dark red/purple' colour - therefore, in some peoples eyes the blood is purple, whereas others would call this purple - blue.

I suppose people could say that.. But Dark red is very different from Blue, and although slightly similar, so is purple.
What you're saying there is that "this is the reason people say it is blue" you are not confirming whether it is blue or not, if that makes sense.

[Mentor]

ooook, i think some people here need help, so todays copy of for Compleat and utter Morons.

Blood For Compleate and utter morons

Human blood is RED

Why is it red? becuse the "red Blood Cells" (some of the brighter ones may have noticed the implication of the name) happen to be RED not blue or any other colour.

Are blood contains a few types of blood cell, White blood cells, Red Blood cells and Platelets all contained within the plasma. (nothing there appears blue)
Red blood cells or erythrocytes (the type that carry oxigen around the body) are some what bigger than the others, hence to the naked eye blood appears red.

If your blood is blue, you may want to just confirm that your not a crustaceans or mollusks, if you are, bravo on manageing to work a computer, if your not.

Im an idiot and i dont belive you
For those in this catagory, ill provide some futher evidance.


Colour

In humans and other hemoglobin-using creatures, oxygenated blood is bright red. This is due to oxygenated iron in the red blood cells. Deoxygenated blood is a darker shade of red, which can be seen during blood donation and when venous blood samples are taken. However, due to an optical effect caused by the way in which light penetrates through the skin, veins typically appear blue in color. This has led to a common misconception that venous blood is blue before it is exposed to air. Another reason for this misconception is that medical charts always show venous blood as blue in order to distinguish it from arterial blood which is depicted as red on the same chart.
- http://en.wikipedia.org/wiki/Blood

[GommeInc]

There is oxygen in the needle. It has been in contact with oxygen and therefore when it contacts the blood, the blood inside the needle turns red.

Nixt, you say blood is a 'dark red/purple' colour - therefore, in some peoples eyes the blood is purple, whereas others would call this purple - blue.



There is oxygen in the needle. It has been in contact with oxygen and therefore when it contacts the blood, the blood inside the needle turns red.

Nixt, you say blood is a 'dark red/purple' colour - therefore, in some peoples eyes the blood is purple, whereas others would call this purple - blue.
False. The tiny amount of oxygen in the needle is not enough to turn a whole 50mls of blood red. You need a good few litres of air to do that. Think of your lungs and you breating out. You breat about 5 litres I believe, might be more. And this amount will only turn about 250ml of blood red. Now take it to the tiny proportions. The needle has about 0.5 of air in, which means under 0.1 of that air is oxygen. Now think of the 50mls, in comparison, IF blood was blue in veins (which it isn't. it is a very dark red. I wouldn't even call it purple, far from it, maroon is close) it would only make it a darker blue/purple. Hardly any change.

If that makes sense?

Blood is always red. When you have blood tests, it is red. The tiny amount of air in the needle does not change anything and I believe pressure has a part ot play with why air is extremely minimal in the needle. If I could, I would ask my doctor/nurse person at my hospital to give me a lecture on it, but I don't go for tests anymore ;)

[Iya.]

Your answers make me laugh.

[GommeInc]

Mentor and I have come with an explaination. Ostinato, you are very wrong with this idea of air in the needle. It wouldn't make the blood test sterile and air in the needle would contaminate the sample, making it pointless. Besides, air in the needle will kill, when a doctor pushes the needle into you, they may accidently push on the plunger bit, which would release a small amount of air, which will be dangerous... I believe it comes down to pressure, so air cannot be in the needle and if it is, it must be released somewhere.

So this means blood in veins IS a darker shade of red, not blue. Because as Mentor says, you seem to lack the idea of common sense that blood is made of RED blood cells, white blood cells etc, no blue is in there. RED cannot change colour to blue, unless you mix it with something, which you can't because you cannot make the colour blue without blue I believe.

[Ostinato]

Mentor and I have come with an explaination. Ostinato, you are very wrong with this idea of air in the needle. It wouldn't make the blood test sterile and air in the needle would contaminate the sample, making it pointless. Besides, air in the needle will kill, when a doctor pushes the needle into you, they may accidently push on the plunger bit, which would release a small amount of air, which will be dangerous... I believe it comes down to pressure, so air cannot be in the needle and if it is, it must be released somewhere.

So this means blood in veins IS a darker shade of red, not blue. Because as Mentor says, you seem to lack the idea of common sense that blood is made of RED blood cells, white blood cells etc, no blue is in there. RED cannot change colour to blue, unless you mix it with something, which you can't because you cannot make the colour blue without blue I believe.

At the end of the day Gomme, you can simply say I am wrong and I vise versa, but neither of us actually know the final facts and have actual evidence, other than that of some site - which can't actually be relied on. This issue is generally a matter of opinion, and I feel you need to be willing to respect other peoples, as I am.

I have my own personal beliefts that blood is not red until it's out of the body and in contact with oxygen, whereas you believe it's always red - fair enough - but please do not simply deem my opinion as 'wrong' when no-one can actually, officialy say either of us is right.

[Mentor]

At the end of the day Gomme, you can simply say I am wrong and I vise versa, but neither of us actually know the final facts and have actual evidence, other than that of some site - which can't actually be relied on. This issue is generally a matter of opinion, and I feel you need to be willing to respect other peoples, as I am.
If you think it is a matter of opinion, id be forced to conclude you need serious psychiatric help? maybe the ability to fly is also a matter of opinion...

The facts are. Blood is RED. not blue.
You are WRONG, but dont want to admit it.
You are presenting NO evidence, but try to undermine evidence others are providing.

Now, take a while guess. Why do you think Red blood cells are called red blood cells?
And no, its not because there blue.

Ask your science teacher, or your GP what colour blood is, They will tell you red.



I have my own personal beliefts that blood is not red until it's out of the body and in contact with oxygen, whereas you believe it's always red
You believing its true, does not make it true. You see for those of us who live in reality, red blood cells are red, and hence so is blood. So despite what you belive your still wrong. I dont believe your wrong, i KNOW your wrong


- fair enough - but please do not simply deem my opinion as 'wrong' when no-one can actually, officialy say either of us is right.
Well even thats wrong, becuse one hell of alot of people can, Deoxigenating blood isnt a particaly hard thing to do if your deperate. Now stop digging your self a deep whole and makeing yourself look stupid, admit your wrong, you made a mistake and your a big enough man to admit when your wrong. This way you may actualy have a little respect left on this form "/

[Ostinato]

If you think it is a matter of opinion, id be forced to conclude you need serious psychiatric help? maybe the ability to fly is also a matter of opinion...

The facts are. Blood is RED. not blue.
You are WRONG, but dont want to admit it.
You are presenting NO evidence, but try to undermine evidence others are providing.

Now, take a while guess. Why do you think Red blood cells are called red blood cells?
And no, its not because there blue.

Ask your science teacher, or your GP what colour blood is, They will tell you red.


You believing its true, does not make it true. You see for those of us who live in reality, red blood cells are red, and hence so is blood. So despite what you belive your still wrong. I dont believe your wrong, i KNOW your wrong


Well even thats wrong, becuse one hell of alot of people can, Deoxigenating blood isnt a particaly hard thing to do if your deperate. Now stop digging your self a deep whole and makeing yourself look stupid, admit your wrong, you made a mistake and your a big enough man to admit when your wrong. This way you may actualy have a little respect left on this form "/


Excuse me. I would appreciate if you keep speak to me in a more civilised manner and treat me with the same respect as I do you.

I'm not saying that the colour of blood is a matter of opinion, but the only evidence anyone has actually posted here, is some links from Wikipedia etc. There has been no actual evidence that blood is red all the time, just quotes, so I suggest you get your facts right before trying to undermine me, sunshine.

What I was saying is, none of us who are posting here actually know what colour it is - we all have our own personal beliefs and opinions, and everyone should respect each other's as they do their own.

[Eamonn]

I thought blood was always red ;s or I just watch too many cartoons hmm.

[Mentor]

Excuse me. I would appreciate if you keep speak to me in a more civilised manner and treat me with the same respect as I do you.
I dont respect people who refuse to acknolage there wrong, You may as well be throwing a tantrum right now, as this is all your aurgment amounts to. You have posted ZERO quotes. You have posted ZERO evidence. Wikipedia is a sorce of evidance, and has proven to be a largely reliable one.
You can talk in what ever mannor you please, it has NO effect on the underlying argument you are putting forward, your simply presenting adhomin arguments, Dispite whether your presenting them in a polite way.
What reason do i have to respect someone who cant admit there own failings "/


I'm not saying that the colour of blood is a matter of opinion,
no thats exsactly what you said...

This issue is generally a matter of opinion



but the only evidence anyone has actually posted here, is some links from Wikipedia etc. There has been no actual evidence that blood is red all the time, just quotes, so I suggest you get your facts right before trying to undermine me, sunshine.

Welll being over the internet i cant exsactly demostarte it to you from here, i can provide a pretty much infinate collection of links from 1000s or reptuable sorces tell you the answer, but you could just ask google if you wanted to see them. Or Just take a trip down to your local GP and ask. Hell ask a sciance teacher, lecturer, or whom ever you like.

Hell if you to stupid to realise RED BLOOD CELLS are red, theres little hope for you? did you know Green paint is also green? and that a flat surface is flat? or do you want to dispute them as well. From the name the logic is a simple matter of a prioi dedcution...




What I was saying is, none of us who are posting here actually know what colour it is
Becuse you dont, doesnt mean the rest of us are as ignorat as your constanty showing yourself to be...


we all have our own personal beliefs and opinions, and everyone should respect each other's as they do their own.
Yes we do, and my personal belife and opinion is your opinion is Idiotic, Which you equaly dont seem to respect. And regaurless of opinions or belifes blood isnt going to magicly change colour just becuse you want to be right. You see, im honest, im not going to pretend to respect an opinion i dont respect...

[GommeInc]

Excuse me. I would appreciate if you keep speak to me in a more civilised manner and treat me with the same respect as I do you.

I'm not saying that the colour of blood is a matter of opinion, but the only evidence anyone has actually posted here, is some links from Wikipedia etc. There has been no actual evidence that blood is red all the time, just quotes, so I suggest you get your facts right before trying to undermine me, sunshine.

What I was saying is, none of us who are posting here actually know what colour it is - we all have our own personal beliefs and opinions, and everyone should respect each other's as they do their own.
Errrm, excuse me? Anyone home? I used to have blood tests weekly when I was six, I know precisely what colour it is. It is a dark red, slowly going into brown "/ You cannot exactly say you have any proof either, you keep posting "quotes etc" so you have no right to tell us what we are doing, and most the things I have said are common sense and things quoted from wikipedia etc ARE common sense. All you come out is with false belief as if you have made them up on the spot just to be different.

The whole process of blood is complex, I know you have to keep it warm and I have seen what happens in this machine which shakes the blood up in tubes. It also helps de-oxygenate them further, and it is deffinately a dark red, maybe hinted a bit purple, where youget this insane and silly idea of it being blue. Take it from someone who knows, not your brain which is making stuff up on the spot.

People only believe it to be blue because veins are blue, they haven't got the brains to figure out what is actually running through the veins. RED blood cells. Not BLUE blood cells. It is not a matter of opinion, it is a matter of fact "/ You strike me to be someone who will not admit he is wrong.

[Mentor]

http://www.globalclassroom.org/blublud.html

This site seems more about Ostinato's level, im not sure i could dumb it down any more myself.

[^.^]

blood is blue untill it comes into contact with oxygen then it goes red :)

[GommeInc]

;2323627']blood is blue untill it comes into contact with oxygen then it goes red :)
Oh God, another idiot... Please read what has been said. It is clearly red, if it is blue, you have serious problems. It is always red, it is a darker shade when it is inside veins where it is deoxygenated and a brighter red when it is oxygenated.Please get your facts right also.

[-Dispute]

I think its dark red

[Nixt]

I swear, when the doctor comes to our school, as she does every tuesday for some workshop for people who have heath queries. I am going to ask her and settle this once and for all :rolleyes: even though in my opinion it is obvious already.

[GommeInc]

I am going to ask my doctor Tuesday afternoon when I have a check up. I know it for a fact to be red, not for opinion like Ostinato and others believe. I have seen it deoxygenated, I have seen the machine they use to deoxygenate it and shake it up at a hospital, it is a dark shade of red. Not purple, not blue, not anything other than red.

[Nixt]

I am going to ask my doctor Tuesday afternoon when I have a check up. I know it for a fact to be red, not for opinion like Ostinato and others believe. I have seen it deoxygenated, I have seen the machine they use to deoxygenate it and shake it up at a hospital, it is a dark shade of red. Not purple, not blue, not anything other than red.

As I have said.. In my opinion it is red, always red.. though some people consider purple.
Evidence presented seems to confirm that, I mean, although the internet isn't 100% reliable I think it is pretty obvious.

[GommeInc]

It is pretty obvious. I am starting to wonder if these people believing it is purple/blue are religious and believe Jesus turned water into wine :rolleyes: Same conditions kinda apply.

[Ostinato]

Lol you are all so obnoxious you really are.

Mentor, I've really never came across anyone so damn right rude and arrogant in my life. Whether or not you agree with my opinion on this matter or not, I really couldn't care less, but me - and several other members of this forum, as they have posted - believe blood is blue until it comes into contact with oxygen. You seem to have some sort of issue with people disagreeing on stuff with you...

There is no need for you to speak to me in the way in which you have been, and if it continues I assure you, I will be taking this further as I refuse to put up with your simple harrasment and abuse.

At the end of the day, you can post as many links to websites as you want - but that doesn't scientificly prove it's true, nor does showing me 'yourself'. If you disagree with me - fair enough, but a lot of people here do agree with me, so I suggest you start realsing your opinion isn't the only one that matters in this discussion.

[Mentor]

Lol you are all so obnoxious you really are.

Mentor, I've really never came across anyone so damn right rude and arrogant in my life. Whether or not you agree with my opinion on this matter or not, I really couldn't care less, but me - and several other members of this forum, as they have posted - believe blood is blue until it comes into contact with oxygen. You seem to have some sort of issue with people disagreeing on stuff with you...

There is no need for you to speak to me in the way in which you have been, and if it continues I assure you, I will be taking this further as I refuse to put up with your simple harrasment and abuse.

At the end of the day, you can post as many links to websites as you want - but that doesn't scientificly prove it's true, nor does showing me 'yourself'. If you disagree with me - fair enough, but a lot of people here do agree with me, so I suggest you start realsing your opinion isn't the only one that matters in this discussion.
Ive come to the conclusion your not worth my time.

Heres your choise.
1. Get back on topic, Provide valid reasoning or evidance for your claim, or a rebuttle for the evidance ive provided.
(attacking my repuation or the reputaion of a website has no effect on the agruments being made)
2. Go bother someone else, theres no point debateing if your not going to debate.

And maybe try and exsplain why there called red blood cells maybe...

[Nixt]

Lol you are all so obnoxious you really are.

That comment is hardly necessary. I have said throughout that it is "my opinion and that is how it remains.
All it is, is that in my opinion the evidence presented here, alongside common sense [the RED blood cell notion] makes it clear that my own opinion, and Gomme's and Mentor's are correct.

[Ostinato]

That comment is hardly necessary. I have said throughout that it is "my opinion and that is how it remains.
All it is, is that in my opinion the evidence presented here, alongside common sense [the RED blood cell notion] makes it clear that my own opinion, and Gomme's and Mentor's are correct.


Sorry, that seemed a bit to global, it wasn't actually meant to include you as I do value your opinion.

Obnoxious was the perhaps the wrong word to choose. I was simply implying to his opiniated attitude towards me and other members, not willing to listen to anyone elses point of view.

[Mentor]

Sorry, that seemed a bit to global, it wasn't actually meant to include you as I do value your opinion.

Obnoxious was the perhaps the wrong word to choose. I was simply implying to his opiniated attitude towards me and other members, not willing to listen to anyone elses point of view.

Option two i see :) and you wonder why i dont respect you...

[Sazzle]

ive been taught its always red.

[nets]

It seems the old misconception that blood is blue when it is deoxygenated will never die.

Human blood is red, ranging from bright red when oxygenated to dark red when not. It owes its colour to hemoglobin, a metalloprotein compound containing iron in the form of heme, to which oxygen binds. There exists a popular misconception that deoxygenated blood is blue and that blood only becomes red when it comes into contact with oxygen. Blood is never blue, but veins appear blue because light is diffused by skin. Moreover, the blood inside is dark red and exhibits poor light reflection. From a physiological perspective, veins and arteries appear similar when skin is removed and are seen directly.
.........................

Ostinato (Assistant Forum Manager) Please do not post pointlessly.

[Jamie!]

Aye i've always thought it was red.

Never knew people could get so wound up over what colour blood is!! :p

[entor M]

I never knew people were so pathetic as to BAN people for being right, just becuse there to big headed and childish to admit when there wrong.. suppose thats what happens when you have prepubsent kids on the admin team *cough* ostinato *cough*

Wayne. (Forum Administrator) Please stay on topic and don't insult staff members. Oh, and by the way, he didn't ban you.

[Seacat]

i guess the only way to settle this would be to go in a deoxygenated tank and cut yourself :P
you'd probably die if you wasnt quick enough but the argument would be settled :D

ps for the record my opinion is that blood is never blue. theres no/not enough oxygen in the blood test tube to deoxygenize all the blood that comes out, so the colour it goes into the tube is the colour its gotta be in your body :p

[alexxxxx]

I thought it was blue/green when unoxygenated.

[brodeo]

Wasn't banning mentor a little bit uneccessary?

Ontopic, i'm confused. Two clever people on the forum have different views.. who to believe!?

SupaIGA (Forum Moderator) - Please stay on topic.

[GommeInc]

Right... You ban a member for a debate? Surely that means the debate forum should be closed from here on? This is rather confusing...

Ostinato, I am sure you would be very annoyed if someone you were talking to disagreed with something so trivial and simple that they kept denying it for some strange and pathetic reason unknown. That is precisely why Mentor shows very little respect for you, and has lossed his temper with you, because you continue to deny the obvious. It is obviously red, you have not come up with any good ideas other than deoxygenated blood. Deoxygenated blood is red. It is a darker shade. Not purple, not blue. Red. It is that simple.

Take it from someone who actually has had experience with blood. I used to have many blood tests when I was little. I think I was 7 or 8 at the time when the Colchester General Hospital had an open day and I was looking around when I saw the doctor who used to take my blood. She asked me if I and my parents would like to go see the room they deoxygenated and shake the blood to keep it from going solid. I obviously agreed.

The blood was kept in tubes similar to test tubes, just with a proper lid on and a bit smaller. The blood was been shaken and was a dark red, possibly a bit brown. It was not blue, as I can correctly vision it in my mind. There were different areas on the machine where the blood was dealt with. Basically the first area is where the tube is tilted left then right. The next one shakes it and so on and so forth to stage 4. Then it is put into sacks where they can be used for transfusions.

Next time you go into a hospital, take note of the colour of the blood in the transfusion bags, it is a darker shade of red. Please do not lecture me on this "it has been oxygenated" crap, because it by far has not, it wouldn't be good for the persons body to have oxygenated blood in their veins and then double oxygenated when it is back in the heart being oxygenated. Think of the logic.

It is that simple, but you ignorantly refuse to admit it, and get side tracked by going completely off topic by lecturing someone who has very little respect for you, which I have to admit, I don't respect you because you A) Go off topic and B) Refuse to admit you are wrong or admit to new knowledge.

I want yu to give me more reasons as to why you think blood is blue. Not this deoxygenated rubbish.

Oxygenated blood is red because:

1. Red blood cells/haemoglobin is a vibrant red when exposed o oxygen.
2. For obvious reasons, red blood cells are red, white blood cells are white and platelets are a white going on straw yellow. No blue involved.

Deoxygenated blood is red (still) because:

1. Red blood cells are obviously still present in the body, but not oxygenated, giving off a darker red. A colour cannot change colour. Especially to a blue which is the opposite of red.


Wasn't banning mentor a little bit uneccessary?

Ontopic, i'm confused. Two clever people on the forum have different views.. who to believe!?
It was very unnecessary, considering I haven't seen the rule he has broken. And debating about something is not against the rules "/ I never knew Ostinato was clever... I think this maybe the reason why... (no disrespect, but this simple debate has led you to look like a fool).

[Eamonn]

Omg they banned mentor because he was right?? What is right with that ''/ very stupid imo and yeah blood is red always me thought.

SupaIGA (Forum Moderator) - Please stay on topic.

[entor M]

He suffers from HTFUOATABW syndrome so you cant realy balme him... ok thats a lie, its probably more reason to blaim him.
Most 5 year olds could answer this question, i mean...if a 5 year old draws blood what could cryaon does he use?

Blood is RED. Why? Becuse its made up of RED blood Cells.

But if you look at vains they appear blue? yes threw your skin they do, take one out its clear, when has no fulid in it, put fluid in it, it will be blue, this is regardless of whether the fluid is red, green, yellow or any other colour.

Why? becuse of the way light passes threw its outer wall.

But on the sciance diagrams aimed at children there drawn blue? This is so people can tell whether the blood is deoxignated or oxigenated?

So that means its blue? No it means it was drawn for people ignorat of biology.

How can you know? Well all people of authorty say its not blue, scientists, doctors, lab technitions, anyone capable of reading an encycolpedia, or puting 2 and 2 together and notieing red blood cells are probably red.

But i dont belive them, a couple of kids agree with me its blue, so anyone that would actualy know the answer must be wrong? No, you could just go dexoignate blood, they do it alot, its kinda simple.

[amy-tha-angel]

They Say Its Blue Before It Comes Out And Then Wen You Cut YourSelf Or Bleed.. The Oxygen Gets To It Before You See It And It Goes Red! x

[GommeInc]

Please read the before post before making silly comments, thank you :rolleyes:

[entor M]

They Say Its Blue Before It Comes Out And Then Wen You Cut YourSelf Or Bleed.. The Oxygen Gets To It Before You See It And It Goes Red! x
Who ever mr "They" obviosly doesnt know what there talking about though, so maybe you should listen to someone who may actualy of had some exsperence in the matter, or at least is smart enough to gather from the name red blood cells that there most likly red "/

[Jesus-Egg]

Since when was being right about something a bannable offence?

Anyway, if you were to get a knife and stab yourself in the arm, would you be worried if the blood was red? No, you wouldn't because blood actually is red.

If you were to get a knife and stab yourself in the arm, would you be worried if your blood was blue? Yes you would, because there must be something seriously wrong with you, due to the fact that you are a human, and not a crustacean.

[::d4nnyt::]

SupaIGA (Forum Moderator) - Please don't be rude.

[Seacat]

what about white blood cells? :P

it probably has nothing to do with the debate, it just popped up in my mind

[GommeInc]

They are white... Or clear I believe?

[France]

*does A Level biology*

It's actually purpley blue :P

White blood cells contain lymphocites and phagocites which protect the body

[entor M]

*does A Level biology*

It's actually purpley blue :P

White blood cells contain lymphocites and phagocites which protect the body
And the ink front of the american dollar is printed in green, try actualy looking at it :rolleyes: Unless your suffering copper posioning or had a blood transfusion with a crab, you have red hemoglobin. Not hemocyanin, which is the blue blood some custations have "/
Try asking your biology teacher, and they will most likly be happy to tell you its red, although possibly may be sceptical about letting you continue takeing a course...

[France]

It's red when its oxygenated with haemoglobin (and becomes oxyhaemoglobin).
When its deoxygenated, after losing oxygen to muscles and organs etc, it becomes a bluey purpley colour.
And I think you mean "crustaceans". :)


EDIT: I wasn't saying the haemoglobin was blue.

[entor M]

It's red when its oxygenated with haemoglobin (and becomes oxyhaemoglobin).
When its deoxygenated, after losing oxygen to muscles and organs etc, it becomes a bluey purpley colour.
And I think you mean "crustaceans". :)


EDIT: I wasn't saying the haemoglobin was blue.
At no point does it become blue or blue like, purple can be loosly applyed, but for all intencive purpsos the closest it becomes it a darker red. At no point does it ever become blue, since there is no blue material or anything with that hue in your blood stream at any time... barring copper poisoning, but youd be to dead to notice with quantitys of copper in the blood youd need.
haemoglobin being are pretty much the colour of the blood, since the blood is mostly comprised of them "/ other than that theres your platelets, and white blood cells, which are also not blue, and the plasma which is yellowish if anything.
So theres nothing in there that could ever cause your blood to look blue?

As a subnote since your a bioloy student, i suppose you could make the case a normoblast is a purplely blueish colour, but there in a very low concentration, and its colouration is mainly becuse of its nucluius as opposed to the cell, and im not sure they would even be able to carry any oxigen in the blood stream at that level of maturation "/

[e5]

Exsactly the same colour as when it comes out, a darkish red. The vains only seem blue threw your skin becuse of the coulor of the vessle not the blood, and its only used in diagrams to make it clearer "/
It's red, you know when u stand on your head, all the blood rushes to your head, its red then... no oxygen comes with contact at that point... so yeah... always red :]

[brodeo]

It's red, you know when u stand on your head, all the blood rushes to your head, its red then... no oxygen comes with contact at that point... so yeah... always red :]

Are you joking? How old are you?

You're trying to tell me that when you stand on your head the oxygen from your blood diseappears? I really hope you're joking or you are a young child..

[Eamonn]

*does A Level biology*

It's actually purpley blue :P

White blood cells contain lymphocites and phagocites which protect the body
You will find it is always a reddish colour and is never blue as mentor has said as I asked my Biology teacher who has
*done as,a level and most likely degrees in biology*

[Bear-Max]

Well to throw in my thoughts to the pile:

Blood is red.

Deoxygenated it's a deeper red, but still red nonetheless. The blueness of veins is caused by the way light penetrates the skin.

[entor M]

Some interlligence has returned to the thread it seems :D Blood = red, not blue, Claims to the contary are kinda stupid "/

[cunning]

Removed

[GJay]

When the blood is inside the body, it is containing the oxygen within so that is why it appears to be blue. But as soon as blood is exposed to the outside, the oxygen is free! So the colour changes to red.

But it is red the whole time, it just appears to be blue. :)

[:Hazel]

If blood is in the veins it is blue and in arterys it is red however when you cut yourself because oxygen is in the air blood will appear red.

[beer]

blood is actually 2 colours. The blood cells are dark red and the plasma is yellow and looks like urine. Dont you lot ever watch CSI?

[entor M]

When the blood is inside the body, it is containing the oxygen within so that is why it appears to be blue. But as soon as blood is exposed to the outside, the oxygen is free! So the colour changes to red.

But it is red the whole time, it just appears to be blue. :)
o.0 that doesnt even make sence... oxigen doesnt just escape becuse its open to air... water has oxigen and it sites quite happly, Same with blood. And it never appears blue at any point?

If blood is in the veins it is blue and in arterys it is red however when you cut yourself because oxygen is in the air blood will appear red.
No, vains just make it look blue, its still dark red


blood is actually 2 colours. The blood cells are dark red and the plasma is yellow and looks like urine. Dont you lot ever watch CSI?
And white blood cells are white, But when mixed together there appearance is of red.

[DuHast]

No, actually the "color" of venous blood is rather dark. There is no
blue tint at all, but just a sort of blackish-muddy look with red, not
blue, undertones (looking at venous blood in the clear plastic return
line of a heart-lung machine, for example). That venous blood is
"blue" is one of the great myths of our time.

Why can't people understand that biology can not dodge the laws of chemistry and hemoglogin can't turn blue!!!!

http://www.biology-online.org/biology-forum/about763.html