How urine is formed step by step?
Filtration, Reabsorption, Secretion: The Three Steps of Urine Formation. The kidneys filter unwanted substances from the blood and produce urine to excrete them. There are three main steps of urine formation: glomerular filtration, reabsorption, and secretion. It is primarily composed of water and urea. Urea is a special nitrogenous waste compound that the body must … Read more