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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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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.