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Excretion in human beings

Answer» <p>Ans :- Humanshave two kidneys and each kidney is supplied with blood from the renal artery. The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, andexcretethem in the form of urine. ... The filtrated blood is carried away from the kidneys by the renal vein (or kidney vein).</p>


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