ABDOMEN. 175 



efferent brandies collect into two or three nerves, and 

 by their anastomoses form the posterior mesenteric 

 plexus, which gives branches to the floating colon and 

 rectum, some to the anterior mesenteric plexus, and to 

 the spermatic arteries forming the spermatic plexus ; 

 the last branches co-operating to form the pelvic plexus. 



