46 THE STRUCTURE OF THE FOWL 



membrane. The secretory epithelium of these 

 glands is clear and columnar. The deepest 



part of the mucous mem- 

 brane contains a consider- 

 able amount of muscular 

 tissue constituting the 

 muscularis mucosae. 



The crop (Fig. 14) pos- 

 sesses the same structure 

 as the rest of the oeso- 

 phagus, except that glands 

 are absent. 



The stomach (Fig. 15) of 

 the fowl consists of two por- 

 tions, differing widely both 

 in structure and function. 



1. The glandular stomach 

 is relatively small and tubu- 

 lar, and on superficial ex- 

 amination appears to be 

 little more than a wider 

 continuation of the oeso- 

 phagus. On manipulation, 

 however, it is discovered 

 that the wall of the tube 

 thickness. The position 

 median and between the 



Fig. 15.— Crop, Stomach, 

 and Duodenum. 



ce., cESophagus ; gl.st., glandular 

 stomach; g., gizzard; d.i, first 

 part of duodenum ; d.'-, secoDd 

 part of duodenum ; pan., pancreas ; 

 s., spleen. 



is of considerable 

 of this stomach 



IS 



