Human anatomy, including structure and development and practical considerations . free edge of the fold. On either side of the rectum, between the gut and thewall of the pelvis, lies the pararectal fossa, the size of which varies with the disten-tion of the intestine. The special features of the peritoneum are described with therectum (page 1679) and with the uro-genital system (page 1905). The arrangement over the anterior half of the lateral wall of the true pelvis bdifferent according to se.\, since in the female there is the line of attachment of thebroad ligament of the uterus and the ff)
Human anatomy, including structure and development and practical considerations . free edge of the fold. On either side of the rectum, between the gut and thewall of the pelvis, lies the pararectal fossa, the size of which varies with the disten-tion of the intestine. The special features of the peritoneum are described with therectum (page 1679) and with the uro-genital system (page 1905). The arrangement over the anterior half of the lateral wall of the true pelvis bdifferent according to se.\, since in the female there is the line of attachment of thebroad ligament of the uterus and the ff)3sa for the ovary. Otherwise the featuresare about the same, the vas deferens of the male and the round ligament of thefemale causing similar folds. These structures run backward from the internal ringalong the wall of the pelvis, turn down to the side of the bladder, and boundexternally and posteriorly the paravesical fossa between the pelvic wall and the Fig 146Q. Bladdet Urachus Internalabdominal ring Transversevesical fold External iliac-vessels Left ureterSigmoid flexure. -\as deferens Spermatic \rsscls —^Sup. vesical artery—Ext. iliac artery-IreterVas deferens Recto-vesical foldIreter Peritoneum (cuti Internal iliacarterv Rectum Left common iliac artery Pelvic peritoneum from above and behind, showing folds and fossae. bladder when the latter is not distended. A transverse fold of peritoneum, plicavesicalis transversa.^ passes laterally from the upper surface of the empty bladderand subdivides the paravesical fossa into an anterior and a posterior vas deferens, or round ligament, forms (the body being upright) the lower sideof the obturator triangle, which is completed in front by the external iliac vein andbehind by the ureter, which crosses the external iliac vein at the apex. The obtu-rator vessels and ner\e lie in the floor of this triangle. In the female it is crossedby the lateral attachment of the broad ligament of the uterus, behind which is th
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