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Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
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The familiar sounds of your heart are made by the heart's valves as they open and close.