Excretory System

Kidneys, Ureters, Bladder, Urethra

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The Excretory system helps the body maintain homeostasis by getting rid of the wastes. For example, when you need to go to the bathroom, your kidneys filter urea from your blood which later becomes urine. When the Excretory system doesn't work, it could cause a serious illness or death. For example urea could build up and become deadly and toxic.


The Excretory system interacts with the circulatory system, the endocrine system, and the digestive system. Blood circulates through one of the two Kidneys and urea, uric acid, and water are filters out of the blood. The Endocrine system controls the Excretory system. If you drink a lot of water, hormones are released that allow more urine production. The Excretory and Digestive systems work together by getting rid of wastes you eat and drink.