410 



DIGESTIVE SYSTEM OF THE PIG 



two chief lobes. The caudate lobe is prismatic and blunt-pointed. The neck of 

 the gall-bladder is long. The l)ile-duct joins the pancreatic duct to form a common 

 duct (Ductus choledochus communis) which opens into the duodenum al)out one 

 foot (ca. 30 cm.) from the pylorus. 



The pancreas is arranged as in the ox. Its duct unites with the bile-duct. 



The spleen (Fig. 301) is somewhat triangular, with the angles rounded off. It 

 weighs about three or four ounces (ca. 100 grams). Its length is about five inches 

 (ca. 12 to 13 cm.) and its greatest width about four inches (ca. 10 cm.). The parietal 

 surface is convex and is related to the diaphragm, to which rather more than the 

 anterior third is adherent. The visceral surface is concave and its anterior half is 

 attached to the dorsal curvature of the rumen. The dorsal end or base is attached 



Gall-bladder 



Umbilical fissure 



Poslerior vena 

 cava 



Falciform 

 ligament 



Fir.. 306. — I.ivFR OF Shki;i>, Parietai- SrnfACK; IIardkxkm in situ. 



to the left crus of the diaphragm under the last two or three ribs. Tiie liilus is at 

 the posterior basal angle. The ventral end is narrower and thinner than the base; 

 it is situated opposite the ninth and tenth ribs above their middles. 



DIGESTIVE SYSTEM OF THE PIG 



THE MOUTH 



The rima oris is extensive, the angles of the mouth being situated far back. 

 The upper lip is thick and short, and is blended with the snout; the lower 

 lip is small and pointed. The labial glands are few and small. 



The mucous membrane of the cheeks is smooth. The buccal glands are 



