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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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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.