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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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People about to have surgery must tell their health care providers about all supplements they take.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.