Mechanism Of Urine Formation In Human: Nitrogenous wastes are formed inside all the body cells. These wastes are transported to the kidneys by blood and are changed into urine by three processes- Ultrafiltration or Glomerular Filtration. Tubular Reabsorption or Selective Reabsorption. Tubular Secretion or Excretion or Augmentation. Glomerular Filtration: The first step in urine formation is the filtration of blood, which is carried out by the glomerulus and is called glomerular filtration which is a passive process. Blood enters the glomerulus through the afferent arteriole which has a wider diameter than the efferent arteriole that drains the blood. Therefore the … Continue reading Mechanism Of Urine Formation In Human