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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.
The kidneys are part of the body's urinary tract. The urinary tract consists of two kidneys, two tube-like ureters that drain urine from each kidney into the bladder (a storage sac), and the urethra, another tube that carries the urine out of the body.Muscles help control the release of urine from the bladder.owever, when kidney â or renal â function drops below 25% (people with two healthy kidneys have 100% of their kidney function), serious health problems occur, and when function drops below 10-15%, critical intervention in the form of dialysis or kidney transplant becomes necessary to maintain life.