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health advisory Hospital Health advisory 2007-11-16 5:20:29

Why do people think that? It is MOST CERTAINLY NOT TRUE. No, no, no! It's a myth that a lot of people believe. Here is why your veins appear blue:

Veins appear blue because light, penetrating the skin, is absorbed and reflected back to the eye.

to everyone who believes that your blood is blue, i'm sorry, but it is wrong. Who agrees and disagrees? Why?

Answer:

For one thing, "blue blood" is traditionally the color of noble blood, so they might just be stuck up.

For another, yes blood is red (I should know, I gave blood from a seemingly-blue vein yesterday, and I may have noticed the color when it came out), but some differentiating points that have been made have slight degrees of truth to them. For example, blood in veins does have a lower oxygen concentration, so it does get slightly darker. But it does not appear blue. Anyone else who has given blood out of a vein, on purpose or by accident (although I hope its on purpose, accidents should be more cappillarry cuts) knows that.

Thank you, have a nice day.

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Because it is! Arterial blood is bright red,crimson almost, but venous blood which has given up it's oxygen is much darker and bluish.

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blood is blue inside of you

turns red when it hits the air

read about it at your local library

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I think its dark red,....blue is just some crap people cooked up for attention.....

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its the blood cells that give it its color

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actually, i've always thought that the blood traveling away from the heart was red (due to being rich in oxygen) and the blood traveling back to the heart was blue (due to being oxygen deprived) if veins appear blue, then why not arteries? and isn't any visible light "reflected back to the eye" isn't that what vision is?

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I am glad you know how colour is perceived, but you seem to have forgotten that there is a reason we perceive those colours. Red can not appear blue, they are primary colours.