The
urinary bladder is the organ that collects
urine excreted by the
kidneys before disposal by
urination. A hollow
muscular, and distensible (or elastic) organ, the bladder sits on the
pelvic floor. Urine enters the bladder via the
ureters and exits via the
urethra. There is no exact measurement for the volume of the human bladder, but different sources mention 500 mL (~17 oz) to 1000 mL (~34 oz).