Urinary Bladder Anatomy and Physiology: Storage and Elimination of Urine

The urinary bladder is a distensible muscular reservoir located in the lesser pelvis, posterior to the pubic symphysis. Ureters deliver urine from the kidneys. The bladder stores urine (capacity 400–600 mL) until voluntary voiding via the urethra, coordinated by the pontine micturition center and sacral spinal cord.