how is urine produced in our body?
Each kidney is made up of large no.of small functional units called Nephrons. These Nephrons help in the filteration of blood and in the formation of urine. Each Nephron has three main parts. Bowman 's cup glomerules and nephric tubule. ( bowman 's cup contains bunch of capillaries called glomerules. This cup is connected to U-shaped Nephric tubule. It opens into collecting Duct.)
filteration of blood n urine formation
In bowman 's cup the renal artery carries the blood for filteration. The glomerules filters the blood. This is called GLOMERULAR FILTERATION. After filteration the filterate is collected in the cup which contains harmful and useful components (Waste components). When the filterate passes through the Nephric tubule, the wall of Nephric tubule absorbs the useful components like maximum water, glucose, amino acids, important salt ions etc. Harmful components like UREA, excess water, excess salt ions, are left in the Nephric Tubule.This is called SELECTIVE REABSORPTION. All the harmful components formed the liquid urine which is passed to the collecing duct. Finally urine is secreted. This process is called SECRETION.
Urine is a waste product which realese from KIDNEY