Question

Given is an example of a certain structure and its special functional activity.
"Kidney and excretion."

Answer 1

Kidneys are bean shaped, reddish brown coloured with a tough fibrous connective tissue covering called renal capsule. The main function of kidneys is excretion. The process of excretion or urine formation takes place in three steps:

i) Ultrafiltration

ii) Selective tubular reabsorption

iii) Tubular secretion