xvi CONTENTS 



CHAPTER XXV 



FOODS: THEIR CLASSIFICATION 



PAGE 



What constitutes food. Classes of foods. Nutrients. Mixed foods. 

 Flesh. Eggs. Milk. Vegetable foods. Composition of foods. - 

 Alcohol. Tea, coffee, cocoa ... .386 



CHAPTER XXVI 



THE ALIMENTARY CANAL AND ITS APPENDAGES 



General arrangement. Subdivisions of the canal. Mouth. Teeth. 

 Tongue. Salivary glands. Throat. Esophagus. Stomach. In- 

 testines. Liver. Pancreas. Blood-vessels of canal 397 



CHAPTER XXVII 



THE CHEMISTRY OF DIGESTION 



The object of digestion. Nature of the digestive process. Digestion 

 products. Salivary digestion. Gastric digestion. Pancreatic di- 

 gestion. Bile. Intestinal digestion. Summary of digestive process. 

 Bacterial digestion. Prevention of self-digestion 417 



CHAPTER XXVIII 



MOVEMENTS OF THE ALIMENTARY CANAL 



Mastication. Hygiene' of the mouth. Deglutition. Movements of the 

 stomach. Control of the pyloric sphincter. Movements of the 

 small intestine. Extrinsic control of stomach and intestinal move- 

 ments. Movements of the large intestine . 424 



CHAPTER XXIX 



THE DIGESTIVE SECRETIONS AND THEIR CONTROL 



Organs of secretion. Forms of glands. The secretory process. Control 

 of the secretory process. Control of the salivary secretion. Control 

 of the gastric secretion. Control of the pancreatic secretion. Con- 

 trol of bile-flow. Control of succus entericus. Digestive history of 

 a meal. Maintenance of good digestion 432 



CHAPTER XXX 



THE ABSORPTION AND USE OF FOODS 



Absorption. Absorption from the stomach. Absorption from the small 

 intestine. Absorption and storage of carbohydrates. Assimilation 



