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When the bladder is about halfway full, your body tells you to go to the bathroom. When you pee, the urine goes from the bladder down another tube called the urethra (say: yu-REE-thruh) and out of your body. The kidneys, the bladder, and their tubes are called the urinary system. Here's a list of all of the parts of the urinary system: 1  the kidneys: filters that take the waste out of the blood and make urine.  the ureters: tubes that carry the urine from each kidney to the bladder.
Urinary System. Your kidneys and bladder are the main parts of the urinary, or excretory, system. Your kidneys filter waste from your blood and use water, sodium, magnesium and potassium to make adjustments to your body's acid-base balance.Water is also required to help the urinary system excrete waste products.eproductive System. The internal and external reproductive organs make up your reproductive system. Nutrients absorbed from the digestive system, such as vitamin C, selenium, zinc and folate, support the formation of sperm and the development of eggs.