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Why veins are blueThe blood in veins (not arteries) has not been oxygenated yet. Once the Oxygen is introduced the blood turns red. The term "bluebloods" does not just refer to those with a royal pedigree. Everyone's blood is blue at a certain stage in the circulatory system.

No, blood is NEVER any colour but red, just different shades. The green-blue colour is due to the veins being close to the surface and therefore being affected by the pigment in your skin.

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13y ago
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12y ago

First of all, this is America and we don't spell the word color with a you. Secondly, human veins are purple. They just have an odd hue when you see them through your translucent skin. By the way, wow, a 12 year old girl (me) is smarter than you. Well hate to boast but I am in all GT (gifted and talented) as in the smart kid's class.

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11y ago

Because our blood red to dark red and when seen through skin it looks as if it is green-blue!

I dont know!!??

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Q: Why the colour of vein is green?
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