Chap. XIV] 



SUMMARY 



279 



mucous membrane, (2) the middle one is muscular and fibrous 

 tissue, and (3) the outer one is serous membrane derived from 

 the peritoneum. 



Function. — The gall-bladder serves as a reservoir for the bile. 

 During digestion the bile is poured steadily into the intestine ; 

 in the intervals it is stored in the gall-bladder. 



SUMMARY 



Digestion. — This is the process of changing food into products ca- 

 pable of absorption. It is dependent on the proper functioning of 

 certain organs that are grouped together and called the digestive 

 system. 



Mouth. 



Pharynx. 



(Esophagus, or gullet. 



Stomach. 



Digestive 

 System 



Alimentary 

 canal 



Small or thin in^ 

 testine 



( Duodenum. 

 i Jejunum. 

 i Ileum. 



f Caecum. 



Large or thick in- ^ , 

 ^° . < Colon 



testme i ^^ ,• 



-r, j^ I Descending. 

 [ Rectum. ° 



r Ascending. 

 < Transverse. 



Accessory 

 organs 



Alimentary 

 Canal 



' Salivary glands. 

 Tongue. 

 Teeth. 

 Pancreas. 

 Liver. 

 ' About 28 ft. long. 

 From mouth to diaphragm - 

 3 coats 



From diaphragm to rectum 

 4 coats 



Above — 

 palate 



Hard palate. 

 Soft palate — 

 tonsils. 



r Mucous. 

 < Areolar. 

 [ Muscular. 



Mucous. 



Areolar. 



Muscular. 



Serous derived from peri- 

 toneum. 



uvula, palatine arches, and 



Mouth or 

 Buccal Cavity 



Below — tongue. 

 Front — lips. 

 Sides — cheeks. 



Tonsils. 



Contains 



Tongue. 

 Salivary glands. 

 I Teeth. 



