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On the cut surface of the pelvis, identify the pubic symphysis and the retropubic space (of Retzius) located just posterior to it. Next, examine the urinary bladder. This hollow muscular organ lies in the true pelvis and is supported by the fibers of the levator ani muscle and the prostate gland. The most anterior and superior part of the bladder is the apex. The median umbilical ligament [near the tip of the probe, extending anteriorly and superiorly], a remnant of the urachus, extends from the apex of the bladder to the umbilicus. The posterior surface of the bladder is the base of the urinary bladder.
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