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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

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There are 20 feet of blood vessels in each square inch of human skin.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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