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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 shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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The average adult has about 21 square feet of skin.
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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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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.