rectovesical pouch rectovesical pouch the rectovesical pouch is the pocket that lies between the rectum and the bladder in males in humans and other mammals. it is lined by peritoneum. rectovesical pouchmedian sagittal section of male pelvis. (rectovesical excavation labeled at center right.)male pelvic organs seen from right side. bladder and rectum distended; relations of peritoneum to the bladder and rectum shown in blue. the arrow points to the rectovesical pouch.detailsidentifierslatinexcavatio rectovesicalista98a10.1.02.513mta23727fma14727anatomical terminology structure the rectovesical pouch is a space between the rectum and the bladder in men. it lies above the seminal vesicles. it is lined by peritoneum and at its base is the rectoprostatic fascia (denonvillier's fascia). when a man is upright or supine, it is the lowest part of his peritoneal cavity. it may contain parts of the ileum (lower small intestine) and the sigmoid colon. in women, the uterus lies between the rectum and the bladder. therefore, women do not have a rectovesical pouch, but instead have a rectouterine pouch and vesicouterine pouch. after a hysterectomy in women, the remaining peritoneum may be referred to as a rectovesical pouch. clinical significance when a man is upright or supine, the rectovesical pouch is the lowest part of his peritoneal cavity. because of this, peritoneal fluid and other fluids that enter the peritoneal cavity, including ascites, blood and pus, tend to collect in this pouch. additional images median sagittal section of pelvis, showing arrangement of fasciae the peritoneum of the male pelvis