LESSON XXL 



(ESOPHAGUS AND STOMACH. 



1. Transverse vertical section of the cardiac end 

 of the stomach 1 (alcohol or chromic acid *2 p.c.). 

 Stain with hsematoxylin and eosin ; a few seconds in 

 the eosin will probably give a sufficient stain. 



a. Observe under a low power, 



Externally, the thin connective-tissue layer of the 

 peritoneum. 



The muscular coat, consisting of an outer longi- 

 tudinal and an inner circular coat of un striped muscle ; 

 the former will appear as a cross section of a number 

 of bundles with connective tissue running in between 

 them from the peritoneum ; the latter as a continuous 

 layer. On the inner side of the circular coat some 

 small oblique muscular bundles may perhaps be present. 



The submucous coat of connective tissue. If the 

 mucous membrane is in folds the submucous but not 

 the muscular coat will be seen to run up in the folds. 



The muscularis mucosae, or thin stratum of 



1 Stomach of rabbit, cat, or dog. The muscular layers are thinner 

 in the rabbit than in the cat or dog. 



