CONTENTS 



OF THE SECOND VOLUME. 



PART II. THE VITAL FUNCTIONS. 



Page 



CHAPTER I. OBJECTS OF NUTRITION - 9 



CHAPTER n. NUTRITION IK VEGETABLES - 19 



1. Food of Plants - . - 19 



2. Absorption of Nutriment by Plants - 21 



3. Exhalation - 27 



4. Aeration of the Sap - - 28 



5. Return of the Sap - 32 



6. Secretion in Vegetables - 38 



7. Excretion in Vegetables - i - 43 



CHAPTER III. ANIMAL NUTRITION IN GENERAL ... 47 



1. Food of Animals - - 47 



2. Series of Vital Functions - -55 



CHAPTER IV. NUTRITION IN THE LOWER ORDERS OF ANIMALS - 58 



CHAPTER V. NUTRITION IN THE HIGHER ORDERS OF ANIMALS - 80 



CHAPTER VI. PREPARATION OF FOOD - - 86 



1. Prehension of Liquid Food - - - 86 



2. Prehension of Solid Food - - 89 



3. Mastication by means of Teeth - 104 



4. Formation and Development of the Teeth - 114 



5. Trituration of Food in Internal Cavities 122 



6. Deglutition - 127 



7. Receptacles for retaining Food ... 130 



CHAPTER VII. DIGESTION - - 132 

 CHAPTER VIII. CHTLIFICATION ..... 148 



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