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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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The horizontal fraction bar was introduced by the Arabs.
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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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Medication errors are three times higher among children and infants than with adults.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.