The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Anterior and posterior pituitary glands.
The major muscles of the human body, anterior side.
