ABDOMEN. 165 



openings of the ducts of the liver and pancreas. Struc- 

 ture : a serous coat expansion of the mesentery ; a mus- 

 cular coat of two layers, one longitudinal superficial, 

 the other circular deep ; a mucous membrane soft, 

 spongy, vascular with thin cylindrical epithelial cells 

 and numerous villi. Glands : of Brunner, of Lieber- 

 kulm or Galcati, solitary glands, aggregated follicles 

 or glands of Feyer. Blood vessels : arteries, from the 

 great mesentery and coeliac trunk. Yeins empty into 

 the portal vein. Lymphatics from three superposed 

 networks in the mucous membrane, l!^erves, from 

 tlie solar plexus. 



Large intestine. — Division : Coecnm, colon and 

 rectum. Ccecum — Situation : the right hypocondriac 

 region, obliquely downwards and forwards. Dimen- 

 sion, little over three feet. Capacity, seven and a half 

 gallons of fluid. Form : conical, terminating in a 

 point inferiorly, with circular furrows interrupted by 

 four longitudinal muscular bands. Mode of attach- 

 ment : adhering directly to the sub-lumbar region, and 

 to the origin of the colon, by the meso-ccecum. In- 

 terior presents valves or transverse ridges, the ileo- 

 coecal valve, and above it the opening of the colon. 

 Structure : a serous coat, longitudinal and circular 

 muscular fibres, a mucous membrane with solitary fol- 

 licles, glands of Lieberkuhn, and a few villi. Blood 



