Nephron = Bowman's capsule + Tubule One end of the tubule is connected to the bowmans capsule and the other to the urine collecting duct of the kidney. Bowman's capsule has a number of small blood capillaries called glomerulus . The glomerulus comes from the renal artery bringing blood containing waste and the other connects to the renal vein through the nephron tubule . The renal vein carries clean blood . Ureters: These are two tubes which carry urine from each kidney ， and open into the urinary bladder. Urinary bladder: A stretchable bag which stores urine until the brain signals to release it. Urethra: Urine is passed out from the body through the urethra . Process of Excretion in Humans : The function of glomerulus is to filter the blood passing through it. It lets substances like glucose， amino acids， the process of removal of toxic wastes from the body is important. This removal is called Excretion . The biological process by which the harmful wastes containing nitrogen are removed from the body is called excretion . Major waste products produced in the Human body: (1) Carbon Dioxide: Produced as a waste by the oxidation of food during respiration. It is removed by lungs . (2) Urea: It is produced as a waste by the decomposition of unused proteins in the liver . It is removed by the kidneys . Removal of these wastes is important because their accumulation in the body is poisonous and can harm us. Parts of human excretory system : Kidneys: These are bean-shaped filtration organs ， which remove urea， salts， 2026 by Teachoo Organisms carry out biochemical reactions to produce energy. These biochemical reactions taking place in the body may produce toxic wastes， other waste salts and excess water from the blood in the form of urine (yellow liquid waste). Humans have 2 kidneys. Each kidney is made up of a large number of excretory units called nephrons . Nephrons have a cup shaped bowman's capsule at the upper end. The lower end of the nephron is a tubule. Thus， all useful substances get reabsorbed whereas harmful substances (urea， Human Excretory System Last updated at July 14，。
water and urea pass into the bowman's capsule and from there into the tubule . In the tubule， unwanted salts。
excess water ) remain in the tubule. The tubule of the nephron then carries these wastes as urine into the collecting ducts of the kidney from where it is taken into the bladder via the ureters. This waste is finally removed through the urethra . ， which if accumulated may harm the organism. Thus。