Viii CONTENTS. 



CHAPTER VIII. PAGK 



How ANIMALS EAT 49 



1. The Prehension of Food 49 



2. The Mouths of Animals 55 



JJ. 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 or 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.... 154 



2. Locomotion 157 



CHAPTER XVIII. 

 1 HE NERVOUS SYSTEM 166 



1. The Senses 1 76 



2. Instinct and Intelligence 184 



3. The Voices of Animals... . 188 



