The filtration units of kidneys are called

The filtration units of kidneys are called

  1. ureter
  2. urethra
  3. neurons
  4. nephrons

Answer

Nephrons are the structural and functional filtration unit of a kidney that serve in filtration, reabsorption and secretion. Ureters are small muscular tubes that extend from the kidney and carry urine into the urinary bladder. The urethra is a canal that carries urine from bladder and expels it out of body. Neurons are structural and functional unit of nervous system.

The correct option is D.