The filtration units of kidneys are called
(a) ureter
(b) urethra
(c) neurons
(d) nephrons
Ans.(d)
Nephrons are the structural unit of kidneys. It is the structural unit of a kidney.
A nephron is utilized to separate water, particles and little atoms from the blood, filter through wastes and poisons, and return required particles to the blood.
Hence option (d) is correct.