FILTRATE from Bowman's capsule.Thus, filtrate passes through the following structures- Bowman's capsule then proximal convoluted tubule then a LOOP of Henle to distal convoluted tubule to collecting duct.Urine, the watery discharge of the urinary system, is PRODUCED by a combination of three processes - Ultrafiltration, followed by selective reabsorption, and then tubular secretion.KidneyIn humans, the kidney is one of the main organs of the excretory system.The kidney's function is the filtration of the blood and removing waste(toxic) products.Waste products and excess fluid are removed through the urine.If the kidney fails a person needs to undergo dialysis.Dialysis is a treatment that FILTERS and purifies the blood using a machine.