VISCERAL ANATOMY. 127 



Mucous. Soft and covered with columnar epithelium. 

 Blood Supply. Great mesenteric and coeliac axis. 

 Nerves. From solar plexus. 



LARGE INTESTINE. 



Twenty-six feet in length, and consists of the cacum, large colon, 

 small or floating colon, and rectum. 



C^CUM. 



An elongated sac, three feet in length, with a capacity of yj 

 gallons, lying in the right hypochondrium. Its superior extremity 

 (or crook) lies under the right kidney, and shows the two open- 

 ings of the ileum and beginning of the colon; it is encircled by 

 the curve of the duodenum. 



Coats. 



Serous, from peritoneum. 



Muscular, four external longitudinal layers, which are inserted 

 into the circular, forming a number of transverse folds. 



Mucous, thicker than small intestine; it contains no Brunnerian 

 glands or patches of Peyer. 



Muscular, of non-striated fibres, an external longitudinal, and 

 internal circular coat. 



Points of Interest. 



Valvulcz conniventes, folds of mucous membrane with fibrous 

 tissue between, in duodenal portion, to retard passage of food. 



Openings of bile and pancreatic ducts, or a common orifice, five 

 to eight inches from pylorus, and a separate one for the accessory 

 pancreatic duct. 



Villi, elevations which allow of passage of food principles in 

 absorption, connected with lacteals. 



Brunner's glands, found in the duodenum; are racemose in 

 character, with a short duct. They secrete intestinal juice. 



Crypts of Lieberkuhn, over all parts of membrane; are simply 

 depressions lined with columnar epithelium. 



Solitary glands are lymphoid tissue with no duct, and are more 

 abundant in the large intestine. 



Glands of Peyer are groups of the preceding, found for the 

 most part in the ileum; they are one hundred in number; the 

 largest are ij inch square, oval in shape, and situated opposite 

 the mesenteric attachment. 



