Function and Location
The bladder, located in the pelvis, is a hollow, muscular, balloon shaped organ that stores urine. The kidneys make urine when they filter the blood. Urine flows from the kidneys through a pair of thin tubes, the ureters, to the bladder, where it is stored until a person urinates. During urination, the urine leaves the body by passing from the bladder through another tube, the urethra, which is open at one end. In men, the urethra is located within the penis.