what is nephron ?state its function.

1.	what is nephron ?state its function.
Answer» Nephrons are the basic structural and functional units of the kidney. They consist of a network of tubules and canals specialized in filtration.The nephron is a long tube that runs from the cortex into the medulla and back again to the cortex before joining another tube called the collecting duct.Functioning of Nephron1. Filtration: Filtration of blood takes place in Bowman’s capsule from the capillaries of glomerulus. The filtrate passes into the tubular part of the nephron. This filtrate contains glucose, amino acids, urea, uric acid, salts and a major amount of water.2. Re-absorption: As the filtrate flows along the tubule useful substances such as glucose, amino acids, salts and water are selectively re-absorbed into the blood by capillaries surrounding the nephron tubule.3. Urine: The filtrate which remains after re-absorption is called urine. Urine contains dissolved nitrogenous waste, i.e. urea and uric acid, excess salts and water. Urine is collected from nephrons by the collecting duct to carry it to the ureter.

Discussion