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Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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The average adult has about 21 square feet of skin.