ABDOMEN. 167 



a mucous coat like the coecum. Blood vessels : the co- 

 lic arteries and satellite veins. Lymphatics, empty in 

 the reservoir of Pecquet. Nerves, from the great mes- 

 enteric plexus. 



Small colon. — Length : ten feet. Form : like the 

 small intestine with its external surface bosselated, and 

 provided with tw^o wide longitudinal muscular bands. 

 Course : from the terminal end of the large colon into 

 the left flank, ending in the rectum. Mode of attach- 

 ment : colic mesentery. Interior : valvular folds, like 

 tlie coecum and colon. Structure: a serous, muscular 

 and a mucous coat, like tliose of the colon. Blood 

 vessels : from the small and a branch of the great mes- 

 enteric artery, veins empty into the postal vein. Lym- 

 phatics : as numerous as in the small intestine. Nerves : 

 from the posterior mesenteric plexus. 



Rectum, — See pelvic cavity, page 177. 



AXGEIOLOGY, 



Artekies — ABDOMINAL AORTA. — Continuation of the 

 posterior aorta after it passes through the diaphragm, 

 terminating at the lumbo-sacral articulation by quad- 

 rif urcation forming the two external and internal iliacs. 

 Its collaterals are the lumbar and middle sacral for 

 parietal branches, the coeliac axis, great mesenteric, 



