THE DIGESTIVE SYSTEM 



155 



The Alimentary Tract. The digestion of food takes 

 place in the series of organs known as the alimentary 

 tract or canal. This begins at the mouth, and includes 



Nose 



Salivary, 

 glands. 



Saliva 



Duodenum. 



Large intes- 

 tine. 



Salivary 

 (Parotid) gland. 



Small intes- 

 tine. 



Rectum. 



Vermiform appendix. 

 FIG. 74- General scheme of the digestive tract, with the chief glands open- 

 ing into it (Stockton). 



the esophagus, stomach, and intestines, the organs chiefly 

 concerned in the digestion of food. It is through this 

 canal that aliment or food passes, until, having under- 



