THE STOMACH AND INTESTINE. 



267 



that of the folds between them is composed of long, slender cells, 

 with basally situated nuclei. That portion of the cell-body near 

 its free margin contains very little protoplasm, but presents a well- 

 developed mucous plug or theca, occupying the outer one-fourth or 

 one-third of the cell ; the region of the cell containing the nucleus 

 possesses more protoplasm. This part of the cell extends down- 

 ward in a curved process of diminishing size, which assumes a 



position parallel to the cor- 

 responding parts of the 

 neighboring cells, and 

 nearly parallel to the base- 

 ment membrane. 



Three varieties of 

 glands occur in the stom- 

 ach : (i) Cardiac glands; 

 (2) fundus glands ; (3) py- 

 loric glands. 



Bodies of gas- 

 tric glands. 



Gastric crypts 

 and necks 

 of glands. 



Fundus. 



..-->*-, Mucosa. 



Fig. 208. From vertical section through 

 fundus of human stomach ; X 60 : a and b, Inter- 

 lacing fibers of the muscularis mucosoe ; from a 

 and b muscular fibers enter the mucosa. The 

 fibers of the layer b penetrate those of layer a. 



Fig. 209. A number of fundus 

 glands from the fundus of the stom- 

 ach of young dog, stained after the 

 chrome-silver method, showing the 

 system of fine canals surrounding 

 the parietal cells and communicat- 

 ing with the lumen of the glands. 



I. The cardiac glands have recently been subjected to careful 

 investigation by Bensley ; his account is here followed. They 

 occur in the region of the junction of the esophagus and stomach, 

 occupying a zone varying somewhat in width, but may be as wide 

 as 4.3 cm. The glands are of the type of branched tubulo-alveolar 

 glands. The tubules and alveoli are not of uniform structure. 

 The majority of the lining cells are mucus secreting cells, and 



