直肠肛管血供 Arteries of Rectum and Anal Canal Abdominal aorta Inferior mesenteric artery Inferior vena cava Ascending branch of lett colic artery Middle sacral artery Descending branch of left colic artery ommon iliac artery Extemal iliac artery arenas ntemal iliac arten Rectosigmoid arteries Obturator artery Lateral sacral artery Inferior epigastne-auery Superior gluteal artery Mddle rectal artery Umbilical artery Ischial spine Artery of duct Coccygeus muscle Intemal Inferior gluteal arten pudendal artery Inferior vesical artery Pudendal (Acocks) canal Intemal pudendal arter Ischial tuberosi Inferior rectal artery Posterior Mddle rectal arten ator ani muscle View Inferior rectal arten Ectemal anal sphincter muscle Anus O CIBA-GEIGY直肠肛管血供