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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. :)
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.
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?
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?Quote:
Originally Posted by GJay
No, vains just make it look blue, its still dark redQuote:
Originally Posted by Haze
And white blood cells are white, But when mixed together there appearance is of red.Quote:
Originally Posted by M3LYC-M
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/biolog.../about763.html