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The familiar sounds of your heart are made by the heart's valves as they open and close.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
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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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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.