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There are 20 feet of blood vessels in each square inch of human skin.
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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.