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Asthma cases in Americans are about 75% higher today than they were in 1980.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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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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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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