Question

What is the main function of the kidneys?

Answer 1

Kidney:

Kidneys are the main organs in the human excretory system which take part in the filtration of the blood before the urine is formed.

Functions of the kidney:

1. The most important function of the kidney is to filter the blood for urine formation.
2. It excretes metabolic wastes like urea and uric into the urine.
3. It secretes a number of hormones and enzymes such as erythropoietin, renin and calcitriol.
4. It maintains the acid-base balance of the body by reabsorbing bicarbonate from urine and excreting hydrogen ions and acid ions into the urine.
5. It also maintains the water and salt levels of the body by working together with the pituitary gland.