The blood that flows through the kidneys is A) normally about 20 to 25% of the total cardiac output. B) all filtered through the glomeruli. C) all used to supply the renal tissue with O₂ and nutrients. D) both (a) and (b) above. E) all of these answers.

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The kidneys receive about 20 to 25% of the total cardiac output, but not all of this blood is filtered through the glomeruli, nor is it all used to supply the renal tissue with oxygen and nutrients.

The Blood That Flows Through the Kidneys Is