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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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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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There are more bacteria in your mouth than there are people in the world.
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Cyanide works by making the human body unable to use oxygen.