LESSON XVI. 

 STOMACH. GASTRIC JUICE. MILK. 



A. Structure of the Stomach. 



1. Make transverse vertical sections from the fundus 

 or greater curvature of a rabbit's stomach which 

 has been preserved in spirit (cp. p. 32, F, § 1) or 

 in chromic acid "2 p.c. Stain the sections with 

 carmine or with aniline blue (the sections, are 

 best stained if they are left in a dilute solution 

 of the staining agent one to two days). Observe 

 under a low power 



a. Externally, the thin connective-tissue layer 

 of the peritoneum. 



h. The muscular coat, consisting of an outer 

 longitudinal and an inner circular layer of 

 unstriped muscle. If the sections are ac- 

 curately transverse, the former will appear 

 as a cross section of a number of bundles 

 with connective tissue rufining in between 

 them from the peritoneum, the latter as a 

 continuous layer. On the inner side of this 

 may also be seen a much thinner oblique 

 muscular layer. 



