Question

Why kidney is considered as an excretory organ?

Answer 1

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All Dirty Blood comes from all over body clean in our kidneys by small units called nephrons so kidney is the main excretory organ

Answer 2

The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine. ... The urine from the kidney is collected by the ureter (or excretory tubes), one from each kidney, and is passed to the urinary bladder.