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. 



b. 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 running 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. 



