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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

