1.

ndHow does excretion occur in humanb.in beings?

Answer»

Humanshave two kidneys and each kidneyissupplied 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, andexcrete them in the form of urine. ... The filtrated bloodiscarried away from the kidneys by the renal vein (or kidney vein).



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