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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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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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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.