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Health Sciences 13 Online
OpenStudy (anonymous):

The kidneys contains millions of tiny filtering units called A. Urine B. Villi C. Peristalsis D. Nephrons

OpenStudy (anonymous):

D. Nephrons, the functional units of kidneys Urine is what is excretes. Peristalsis is a type of motion. Villi are in the intestines to increase surface area.

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