The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.
Elephant skeleton
Adult Skeleton: Anterior View
Classification of bones by shape.
Acromegaly. Acromegaly is a metabolic disorder in which excessive amounts of growth hormone are secr