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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.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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The average adult has about 21 square feet of skin.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.