28 4 



THE ABDOMEN AND PELVIS 



into two, a right and a left, by the mesentery, which extends 

 from the left side of the second lumbar vertebra downwards 



FIG. 88. The Posterior Wall of the Infra-colic Compartment. The greater 

 omentum and the transverse colon have been thrown upwards. The 

 mesentery has been divided close to its root and removed together with 

 the coils of the jejunum and ileum. A small part of the pelvic colon 

 and its mesentery has been resected to expose the pelvic portion of the 

 left ureter. 



and to the right for about six inches and terminates at the 

 ileo-colic junction. Coils of small intestine occupy both sub- 

 divisions, and must be displaced when the compartment is being 

 explored. This displacement,, to be effectual, must be at right 



