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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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Excessive alcohol use costs the country approximately $235 billion every year.
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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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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.