viii CONTENTS. 



CHAPTER VIII. piftE 



How Animals Eat 49 



1. The Preliension of Pood 49 



2. The Mouths of Animals US 



3. The Teeth of Animals 63 



4. Deglutition, or How Animals Swallow 72 



CHAPTER IX. 



The Alimentaky Canal ' 74 



CHAPTER X. 



IIow Animals Digest 91 



CHAPTER XI. 



The Absoubent System 94 



CHAPTER XII. 



The Blood of Animals 97 



CHAPTER XIII. 



The Circulation op 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 ] 57 



CHAPTER XVIII. 



The Nervous System 166 



1. The Senses 176 



2. Instinct and Intelligence 184 



3. The Voices of Animals Igp 



