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POP QUIZ:

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What are some functions of the kidneys?

* See answer, S3

POP QUIZ ANSWER:

The kidneys--in the right and left sides of the back at the bottom of the rib cage--have a number of functions, including acting as the body’s filters to cleanse the blood of waste products; and regulating the amount of fluid and of chemicals such as sodium, potassium and calcium in the body. (Question on S1.)

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