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Author Question: Hair grows toward the surface of the skin through the: a. hair shaft b. hair root c. hair ... (Read 473 times) |
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The human body produces and destroys 15 million blood cells every second.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.