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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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The average adult has about 21 square feet of skin.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.