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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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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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.
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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.