THE (ESOPHAGUS THE STOMACH 



417 



lar tissue derived from the palatinus and palato-pharyngeus. The vault of the 

 pharynx (Fornix pharyngis) is divided by a median fold of mucous membrane 

 which is a direct continuation of the septum nasi. On either side of this is an in- 

 fundibulum in which the Eustachian tube opens. 



THE (ESOPHAGUS 

 The oesophagus is short and nearly straight. It has (according to Rubeh) a 

 potential caliber of nearly 3 inches (ca. 7 cm.) at either end, and about ly^^ inches 

 (ca. 4.2 cm.) in its middle part.^ The muscular coat, except near the carcUa, is 

 striated. There are mucous glands in the submucosa to about the middle of the 

 tube. 



Fig. 317. — .\iiuuMiN.\L Viscer.\ of Young Pig, Vp:ntr.\l Aspect. 

 The stomach was very large in this subject. 



THE STOMACH 

 The stomach is large and pyriform. Its average capacity is about 1}^ to 2 

 gallons (ca. 5.7 to 8 liters). When full it extends backward to the last left inter- 



' It is usually stated that the cardiac end is funnel-shaped, but it is not so in formalin 

 hardened cadavers nor in frozen sections. The hiatus oesophagus is a long slit in the right crus of 

 the diaphragm, and the terminal part of the o-sophagus, which lies in it, is flattened transversely. 

 27 



