ABDOMINAL CAVITY 



483 



the descending colon. The point of division into upper 

 and lower branches is very variable. 



The Arterise Sigmoideae, two or three in number, are 

 distributed to the lower part of the descending colon, the 



APPENDIX 



ILEUM 



FIG. 1 86. Dissection of the Inferior Mesenteric Artery. 



iliac colon, and the pelvic colon. The highest branch 

 enters the left iliac fossa, behind the parietal peritoneum. 

 It sends a branch upwards to form an arch with the 

 descending branch of the left colic, and another down- 

 wards, which ultimately enters the pelvic meso-colon and 

 joins the other sigmoid branches. The lower sigmoid 

 I 31 a 



