416 



DIGESTIVE SYSTEM OF THE PIG 



larger, being two or three inches (ca. 5 to 7 cm.) long and about twice the width 

 and thickness of the posterior part. All or most of the ducts from the posterior 



Fig. 314. — Diagram of Zones of Mucous Membrane of Stomach of Pig. 



part unite to form the ductus sublingualis major, which opens near the ductus 

 submaxillaris. Eight or ten ductus sublinguales minores convey the secretion 

 from the anterior part through the floor of the mouth. 



Fig. 315. — Visceral Surface of Stomach of Pig, Fig. 316. — Everted Stomach of Pig, from which the 



FROM which the SeROUS CoAT HAS BEEN MuCOUS MeMBRANE HAS BEEN REMOVED. 



Removed. 



O, ffisophagus; D, duodenum; Di, diverticulum; a, a', a", a'", longitudinal fibers; b, circular fibers; c, 

 external oblique fibers; c', internal oblique fibers; c", cardiac loop; d, fibers which connect branches of cardiac 

 loop; /, fold at entrance to diverticulum; p, pyloric sphincter; p' , pyloric prominence. (Ellenherger-Baum, Anat. 

 d. llau.stiere.) 



THE PHARYNX 



The pharynx presents in its posterior part a median cul-de-sac aljout an inch 



and a half (ca. 3 to 4 cm.) long, which is situated between the ventral straight 



muscles of the head and the origin of the oesophagus. Its lower margin is formed 



by the junction of the posterior pillars of the soft jialate, which contain muscu- 



