A text-book of clinical anatomy : for students and practitioners . Fig. 88.—Cross-section of pelvis at level of sacro-iliac joints. S, Sacrum. I, , Iliac colon (sigmoid flexure). C, Cecum, and beginning of ascending colon, i,Placed to inner side of each sacro-iliac joint. 2, Ureters. 3, Mesosigmoid, showing greatlength of latter. 4, Pelvic colon not cut, seen from above. 5, Omentum. 6, Externaliliac artery. 7, External iliac vein. 8, Iliopsoas muscle. The white dot above it is theanterior crural nerve. 9, 10, and 11, Gluteal muscles. 283. Fig. 89.—Cross-section of female pelvis at leve
A text-book of clinical anatomy : for students and practitioners . Fig. 88.—Cross-section of pelvis at level of sacro-iliac joints. S, Sacrum. I, , Iliac colon (sigmoid flexure). C, Cecum, and beginning of ascending colon, i,Placed to inner side of each sacro-iliac joint. 2, Ureters. 3, Mesosigmoid, showing greatlength of latter. 4, Pelvic colon not cut, seen from above. 5, Omentum. 6, Externaliliac artery. 7, External iliac vein. 8, Iliopsoas muscle. The white dot above it is theanterior crural nerve. 9, 10, and 11, Gluteal muscles. 283. Fig. 89.—Cross-section of female pelvis at level of lower portion of coccyx. C,Coccyx. G, Gluteal muscles. B, Obturator internus. I, Ischium and descendingramus of pubes. F, Head and neck of femur. P, Pectineus muscle. R, Rectum, seen incross-section. One of Houstons valves is seen on the right edge. V, Vagina, the lightspot at the anterior margin represents the external orifice. U, Cross-section of , External iliac vein lying upon the pectineus muscle. 2, External iliac artery. 3,Anterior crural nerve. 4, Parietal layer of pelvic fascia. 5, Inferior vesical artery. 6,7, 8, and 9 Muscles on anterior aspect of thigh (iliopsoas, pectineus, and sartorius). 285 THE LARGE INTESTINE. 287 most frequently occur, either directly or indirectly, as the result of ap-pendicitis. The most frequent point is in the immediate neighborhoodof the ileocecal region, about 50 per cent.; the next most frequent pointis behind the cecum; then the abscesses occurring around the pelvicorgans, especia
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