210 



ANIMAL PHYSIOLOGY. 



[LESSON 61. 



913. In the pylorus of a Dog, large glands (Fig. 332) exist, 

 lined with cylinder epithelium (a), and terminated by coacal append- 

 ages (5) ; the body of the gland is shown at c, 



914. The gastric glands from the middle of the stomach are those 

 which secrete the gastric juice ; the function of those of the pylorus 

 is not known. 



FIG. 332. 



FIG. 88a 



Gastric gland, Dog. 



Gastric glands, Calf. 



In the fourth stomach of the Calf these glands are particularly 

 numerous, a portrait of which is given in Fig. 333. Like the gas- 

 tric glands of the Dog, these also are lined with cylinder epithelium ; 

 there is an absence, however, of ccecal appendages at their termina- 

 tion, which becomes attenuated. 



LESSON LXI. 



NUTEITION IN MAN. 



915. Before proceeding to describe the organs which, by their 

 united action, form the nutrimental system of Man, it will be desirable 

 to state briefly and succinctly the progressive order in which they are 

 used, and the particular function delegated to each to perform. 



916. The teeth may be divided into two chief kinds : incisor (or 

 incision) teeth, placed in the front of the upper and lower jaw, their 

 function being to primarily cut or divide the food ; having done this, 

 it is directly transferred to the second order of teeth, the molars, 

 or grinders, whose function it is to grind and subdivide the food as 

 much as possible. 



