Viii CONTENTS. 



CHAPTER VIII. PAG 



How ANIMALS EAT 49 



1. The Prehension of Food 49 



2. The Mouths of Animals 55 



3. The Teeth of Animals 63 



4. Deglutition, or How Animals Swallow 72 



CHAPTER IX. 

 THE ALIMENTARY CANAL 74 



CHAPTER X. 

 How ANIMALS DIGEST . 91 



CHAPTER XI. 

 THE ABSORBENT SYSTEM 94 



CHAPTER XII. 

 THE BLOOD OF ANIMALS 97 



CHAPTER XIII. 

 THE CIRCULATION OF THE BLOOD 103 



CHAPTER XIV. 

 How ANIMALS BREATHE Ill 



CHAPTER XV. 

 SECRETION AND EXCRETION 121 



CHAPTER XVI. 

 THE SKIN AND SKELETON 127 



CHAPTER XVII. 



How ANIMALS MOVE . 154 



1. Muscle 155 



2. Locomotion 1 57 



CHAPTER XVIII. 



THE NERVOUS SYSTEM 166 



1. The Senses 176 



2. Instinct and Intelligence 184 



3. The Voices of Animals... . 188 



