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There are more sensory neurons in the tongue than in any other part of the body.
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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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There are more bacteria in your mouth than there are people in the world.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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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.