内外括约肌肛管直肠环 E04园) 其误 途昔自 直肠纵肌 肛管内括约用 肛提肌耻 骨直肠部 肛管外括约肌深部 管外括纳肌浅部 舡臂外括约肌皮下部 图402肛管外括约肌
内外括约肌肛管直肠环
外括约肌三环 直肠低曲 覆膜反折处 耻骨联合 肛提肌 方肯坐 是内营 耻骨直肠肌及肛 肛管外括 管外括约肌深部 约肌浅部 暴真,下部扩大成直压,是管 「肛管外括约 解到学说点直图403肛管括约肌环是。4肌皮下部
外括约肌三环
直肠肛管周围间隙 肛提肌 骨盆直肠间隙 坐骨肛管间隙 耻骨直肠肌 和肛管外括 约肌深部 坐骨肛管横隔 缸管外括约 肛门周围间隙 肌皮下部 直,与来 一图405直肠肛管周围间隙
直肠肛管周围间隙
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
Veins of rectum and Anal canal Anterior view Inferior vena cava Inferior mesenteric vein (to portal vein via splenic Common iliac veins Rectosigmoid vein Mddle sacral vein Intemal iliac vein Extemal iliac vein Superior rectal vein(bifurcation)- Obturator vein Communication between Superior vesical and uterine veins intemal and perimuscular rectal plexuses Mddle rectal vein Intemal pudendal Perimuscular rectal plexus Vaginal vein Intemal rectal plexu Inferor vesical vein Communication between Intemal pudendal vein in intemal and extemal udendal ( Alcock's) canal venous plexuses Etemal rectal plexus Inferior rectal vein