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Why is Blood Blue?

Blood is not actually blue, it is red. Your blood is red and it can vary in shades of red from light red to very dark red. When you look upon your skin, you notice that the blood in your veins appears to be blue, which is actually not its true color. When the light shines upon the surface of your skin, your skin actually changes the way the light is reflected on your veins, which are bellow its surface. It is because of this that your blood veins appear blue.

by Margaret Walker on Fri, 02/18/2011 - 11:34


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