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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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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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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.