Peritoneum cavity of small pelvis of male

In men in the pelvic cavity, the parietal peritoneal leaf, descended from the abdominal cavity but its posterior wall, passes through the boundary line, linea terminalis, covering the mesoperitoneally anterior surface of the middle third of the rectum. Then, moving to the upper edge of the seminal vesicles and the vas deferens, the peritoneum goes upward, lining the posterior surface of the bladder, and, leaving the cavity of the small pelvis, passes into the parietal leaf of the anterior wall of the abdominal cavity. In the region of the pubic symphysis, between it and the parietal peritoneum, there remains a small gap - the space of the spaces, spatium retropubicum, filled with fatty tissue.

Between the rectum and the bladder, a frontal gap is formed - a rectus-vesicular cavity, excavatio re-tecticalis, which, when filling the bladder, can be deepened. Borders of this cavity along the edges are rectal-cystic folds, in which the rectum-vesicular muscles lie, mm. Rectovesicales; The latter includes smooth muscle fibers.

With an unfilled bladder along its edges, somewhat ahead of the top of the bladder, the peritoneum forms symmetrically moving folds directed towards the middle umbilical fold. On the posterior surface of the bladder, closer to its apex, the peritoneum forms another transverse vesicle fold, plica vesicalis transversa; It stretches as if between deep groin rings.