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There are 20 feet of blood vessels in each square inch of human skin.
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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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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
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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.