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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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Water wheel is the most promising solution to ocean plastic
Solution (Polynomial Long Division)
Irrigation Technology Can Conserve Water
One Solution to the Nine-Dot Problem
How to detemine the PH of a solution when given the hydrogen concentration