The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
Mucus block in bronchiole
Location of the heart in the chest cavity.
heart
Chambers and valves of the heart.
Mechanisms of action of drugs used for heart failure.