THE INTESTINE 



487 



and numerous large lymph glands at its root; the root is attached in the sublumbar 

 region behind the stomach and blends here with the mesentery of the large intestine 

 The mesenteric part is arranged in close coils and lies mainly above the colon and 

 cfficum, from the stomach to the pelvis; many coils lie against the right flank and 

 on the posterior part of the floor of the abdomen. The opening of .the bile duct is 

 about one or two inches (ca. 2.5 to 5 cm.) from the pylorus, and that of the pan- 

 creatic duct about six inches (ca. 15 cm.) beyond it. Aggregated lymph nodules 

 or Peyer's patches and solitary nodules are numerous and very distinct. The 

 patches are usually band-like and prominent; their number has been found to vary 

 from 16 to 38. They begin 8 to 20 inches (ca. 20-50 cm.) from the pylorus. The 

 last long one is continued a variable distance in the caicum. The solitary nodules 



Fig. 427. — Cecum and Colon of Pig; Left Venthal View. 

 1, Apex of spiral coil of colon; 2, apex of caecum. 



are distinct (except in the duodenum), but are only about a millimeter high. The 

 duodenal glands extend some 10 to 16 feet (ca. 3-5 m.) from the pylorus. 



The large intestine is about 12 to 15 feet (ca. 4 to 4.5 meters) in length, and is 

 for the most part much wider than the small intestine; it is connected by a mesen- 

 tery with the dorsal abdominal wall between the kidneys. The caecum is cylin- 

 drical, about 8 to 12 inches (ca. 20 to 30 cm.) long, and 3 to 4 inches (ca. 8 to 10 cm.) 

 wide. It lies against the upper and anterior part of the left flank, and extends 

 ventrally, backward, and medially behind the coiled part of the colon, so that its 

 ventral blind end usually lies on the floor of the abdomen, near the median plane, 

 and at a variable point between the umbilicus and the pelvic inlet (Fig. 423). Its 

 dorsal end is directly continued by the colon, the line of demarcation being indi- 

 cated by the termination of the small intestine. The ileum joins the csecum 



