Question

Human blood is red because of the protein haemoglobin, which

contains a red-colored compound called heme that is crucial for carrying

oxygen through the bloodstream. Why is it that the color of blood in the

veins appear blue?


please answer it is very urgent​

Answer 1

Sometimes, blood can look blue through our skin. Maybe you've heard that blood is blue in our veins because, when headed back to the lungs, it lacks oxygen. But this is wrong; human blood is never blue. The bluish color of veins is only an optical illusion. Blue light does not penetrate as far into tissue as red light. If the blood vessel is sufficiently deep, your eyes see more blue than red reflected light due to the blood's partial absorption of red wavelengths.

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Answer 2

Answer:

hemoglobin bound to oxygen absorbs blue -green light ,which means that it reflect red-orange light into our eyes appearing red but 5his is wrong ; human blood is never blue .The bluish colour of veins is only an optical illusion .Blue light does not penetrate as far into tissue as red light