What colour is blood?

[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...