What is excretion?

Excretion is the biological process of removing metabolic waste products and harmful substances from the body.

During various life processes, cells produce wastes such as carbon dioxide, urea, excess salts, and extra water. If these wastes accumulate in the body, they can become harmful.

The excretory system removes these substances and helps maintain the internal balance of the body.

In humans, excretion mainly occurs through organs like the kidneys, lungs, and skin. The kidneys remove urea and excess water in the form of urine, the lungs expel carbon dioxide, and the skin removes salts and water through sweat.

Excretion is essential for keeping the body healthy and maintaining proper physiological functions.