if the colour of human blood is red then why does it apper blue...
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Answer:
because inside our body blood does not come in contact with oxygen and is blue the moment it comes in contact with oxygen it turns to red. hope it helps u
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Answer:
Blood is always red, actually. Veins look blue because light has to penetrate the skin to illuminate them, blue and red light (being of different wavelengths) penetrate with different degrees of success. What makes it back to your eye is the blue light.
Meanwhile, here's what happens to the blood in your body:
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