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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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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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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.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.