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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.