40 



show a most marked avidity for eosin. The gland cells 

 stand out very distinctly in methyl-blue-eosin stained 

 preparations, for their contents appear light blue, whilst 

 the epithelium generally is a dense red, a granular red ! 



They do not occur in very great numbers. In some 

 sections the lumen of the oesophagus is filled here with 

 the blue stained contents of these gland cells and the 

 red stained extruded cells. Eosinophilous granules also 

 abound in the secretion. 



The Caecum. — The caecum differs from the part just 

 described in having the simple folds of epithelium and 

 connective tissue thrown into most complex secondary 

 folds. Thus the lumen is split up and reduced in size, 

 and the connective tissue is reduced to a thin layer 

 between the folds of epithelium. 



Another important and obvious distinction is that 

 the eosinophilous cells have become much reduced in 

 number, and hence the lining epithelium has almost lost 

 the granular densely stained appearance. A few 

 scattered gland cells are to be found. What the function 

 of this caecum may be it is difficult to say, for the walls 

 are not in the least like the walls of a gland, and gland 

 cells are reduced in number. 



The Stomach. — In structure the wall of the stomach 

 does not differ essentially from the rest of the alimentary 

 canal. The cavity is lined by a layer of columnar 

 ciliated epithelial cells (hexagonal in transverse section), 

 which are perhaps not so long nor so slender as the cells 

 of the rectum, but resemble them closely. Amongst 

 these cells are scattered eosinophilous cells of the same 

 character as those found elsewhere in the walls of the gut. 

 Gland cells occur but rarely. The nuclei of the epithelial 

 cells are to be found nearer to the basal membrane than 

 those of the cells of the remaining parts of the digestive 



