- 28 HISTOLOGY. 



48. Stomach. Examine the section of a toad's stomach, noticing that the layers 

 correspond with those of the intestine, and make two similar drawings to show : peritoneal 

 epithelium ; external connective tissue layer ; thick circular muscle layer ; connective 

 tissue layer containing blood vessels ; thin submucous muscle layer composed of lon- 

 gitudinal and circular muscle layers ; gastric glands consisting of alveoli and ducts ; 

 columnar epithelium. 



