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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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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.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.