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Urinary bladder
The urinary bladder is a hollow organ that collects the urine created by the kidneys and holds it until it is excreted. It is located in the lesser pelvis (after puberty), lying partially superior and partially posterior to the pubic bones. It is separated from the pubic symphysis by the retropubic space and lies mostly inferior to the peritoneum. It is relatively free in the extraperitoneal subcutaneous fatty tissue. When filled, it ascends to the greater pelvis in the extraperitoneal fatty tissued of the anterior abdominal wall. Laterally is held by the lateral vesical ligaments from the neck and the tendinous arch of the pelvic fascia. Anteriorly is held by the puboprostatic ligament (males) and the pubovesical ligament (females).