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In 1864, the first barbiturate (barbituric acid) was synthesized.
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People about to have surgery must tell their health care providers about all supplements they take.
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There are more sensory neurons in the tongue than in any other part of the body.
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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.