Excretion System in Human - Edubirdie

University:
Eastern Kentucky University
Course:
BIO 208 | Human Anatomy and Physiology I
Academic year:

2021
Views:

179

Pages:

1
Author:

Alma Stephenson

Excretion System in Human All the food we eat is not used by the body, some of it after digestion is not required and thus needs to be removed out of the body as these may be toxic to the body. Like the impure blood or the carbon dioxide rich blood is exhaled out of the body. The waste materials are also removed. This process of getting rid of wastes produced in the cells of the living organisms is called excretion. The parts involved in excretion forms the excretory system. Human excretory system The kidneys are the filters that filter the blood to remove the harmful substances in it. The useful components are then reabsorbed. The wastes dissolved in water are removed as urine. From the kidneys, the urine goes into the urinary bladder through tube-like ureters. It is stored in the bladder and is passed out through the urinary opening at the end of a muscular tube called urethra. Human excretory system Dialysis is an artificial method to purify the blood. When a person’s kidneys stop functioning his or her blood is purified with the help of dialysis machine. It takes out blood from the body filters it externally and then pumps inside the body. Waste products in animals Dialysis The urine comprises of 95% water, 2.5 % urea and 2.5% other waste products. Sweat is also a waste product that contains salts and water. The excretory product is not similar in all animals. We excrete waste product in the form of urea and the birds in the form of uric acid while the fishes excrete ammonia gas that dissolves in water.

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