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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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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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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.