in Excretory Products and their Elimination (Urinary System) by

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The structural and functional unit of kidney is called as a Nephron. It performs nearly all the functions of the kidney. Some of them are:

  1. It plays an important role in excretion, osmoregulation and homeostasis.
  2. It performs key roles in the formation of urine by the three processes of Ultra filtration, reabsorption and secretion.
  3. It regulates salt content, pH, osmotic pressure, blood pressure.
  4. Maintains Acid and base balance.
  5. Removal of harmful products like toxins and poisons from the body.