in Excretory Products and their Elimination (Urinary System) by

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The structural and functional unit of kidney is called nephrons. Each kidney contain about 1 to 1.2 million nephron (i.e. total 2.4 million). These are the main structure which is involved in the formation of urine.

Each nephron filters 125 ml blood per minute and is called GLOMERULAR FILTRATION RATE I.E. GFR.