THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The kidneys maintain homeostasis by controlling the amount of water, ions, and other substances in the blood. Kidneys also secrete hormones that have other homeostatic functions.

Detailed explanation-2: -Each kidney contains over one million microscopic filtering units called nephrons . Each nephron is made of a kidney tubule and is responsible for ‘cleaning’ the blood by removing urea, excess water and mineral ions. The nephrons reabsorb as much water as is needed by the body to maintain the water balance.

Detailed explanation-3: -Water homeostasis is achieved by regulation of water intake and water loss by the kidneys. The former is achieved by sensations of thirst that motivate water acquisition, whereas the latter is regulated by the antidiuretic action of vasopressin.