The bladder is a hollow, balloon-shaped organ in the pelvis. It is part of the urinary system. Urine made in the kidneys passes through the ureters to the bladder, where it is stored. The bladder has a flexible, muscular wall that allows it to expand (get larger) and contract (get smaller). When the bladder is full, the muscles tighten and urine is passed out of the body through the urethra.
The bladder wall is made up of 3 layers.
Other layers of tissue separate the bladder from nearby organs.
The bladder stores urine. Urine is made by the kidneys and travels to the bladder through 2 long tubes called ureters. When the bladder is full, the muscles in the bladder wall tighten to pass urine out of the body through the urethra.
A clinical trial led by the Society’s NCIC Clinical Trials group found that men with prostate cancer who are treated with intermittent courses of hormone therapy live as long as those receiving continuous therapy.