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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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14y ago

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