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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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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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Cyanide works by making the human body unable to use oxygen.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.