SMALL INTESTINE 



263 



is taking place, and may perhaps be concerned also with protein digestion 

 but not with that of carbohy- 

 drates (Miram, Arch. f. mikr. 

 Anat., 1912, vol. 79, pp. 105- 

 113). They do not contain 

 mucinogen granules, although 

 goblet cells occur in their im- 

 mediate vicinity. 



A short distance above the 

 fundus, the epithelial cells of 

 the glands exhibit mitotic fig- 

 ures. From this it is inferred 

 that the outer cells, including 

 those of the villi, are renewed 

 from below. The cells near the 

 bottom of the gland have 

 terminal bars, but they are not 

 as distinct as those of the villi. 



FIG. 256. THE FUNDUS OF AN INTESTINAL GLAND FROM 



THE DUODENUM OF A GUINEA-PIG. X 480. 



a, Cell in mitosis; b, lymphocyte; c, Paneth's cell; 



d, goblet cell. 



During division, the cell seems to be 



drawn up from the basement membrane, as if held in position by the 



Epithelium. 



Tunica propria. 



Portion of a capillary 

 blood vessel. 



Cuticula. 



Nucleus of a lympho- 

 cyte. 



Tangential section of a 

 goblet cell. 



Mucus in a goblet cell. 



Nucleus of a smooth muscle fiber. Central lymphatic vessel. 



FIG. 257. LONGITUDINAL SECTION THROUGH THE APEX OF THE VILLUS OF A DOG. X 360. 

 The goblet cells contain less mucus as they approach the summit of the villus. 



terminal bars (Fig. 256, a). The plane of division is at right angles with 

 the long axis of the gland (as shown on the right of Fig. 256), and after 



