THE ALIMENTARY APPARATUS. 



THE alimentary apparatus consists of the alimentary canal 

 and of certain accessory organs. 



The former is a musculo-membranous canal about thirty feet 

 in length, extending from the mouth to the anus, and comprises : 

 first, the organs of deglutition, consisting of the mouth, pharynx, 

 and oesophagus; and, second, the organs of digestion, consisting 

 of the stomach and small and large intestines. It is lined 

 throughout by mucous membrane. The accessory organs com- 

 prise the teeth, salivary glands, liver, and pancreas. 



Alimentary 

 canal, 



Alimentary Apparatus. 

 ;ition, -I 



Mouth, 

 Organs of deglutition, \ Pharynx, 



(Esophagus. 



Organs of digestion, 

 C Teeth, 



Stomach, 

 Small intestine 



Duodenum, 



{Duodenur 

 Jejunum, 

 Ileum. 



ine, j 



Caecum, 



Large intestine, \ Colon, 

 Rectum. 



Liver, 

 Pancreas. 



Submaxillary, 

 Sublingual. 



THE MOUTH is an oval cavity in which mastication takes 

 place preparatory to deglutition. It is placed at the entrance 

 of the alimentary canal, is bounded laterally by the alveolar 

 processes of the upper and lower jaws and cheeks ; above by the 

 upper teeth and hard palate; below by the tongue, the lower 

 jaw, the mucous membrane between, and the lower teeth; in 

 front by the lips; and behind by fauces and soft palate. It 

 terminates posteriorly at the anterior pillars of the fauces, 

 through the fauces into the pharynx. 

 (218) 



