COIVTEIVTS 



OF THE SECOND VOLUME. 



PART II.— THE VITAL FUNCTIONS. 



Page 

 Chapter I. — Objects of Nutbition ----- 9 



Chapter II. — Nutrition ix 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 - - - - - 43 



Chapter III. — Animal Nutrition in general . . . ^ 



§1. Food of Animals - - - - - - 47 



2. Series of Vital Functions - - - - SS 



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 VIIL — Chyhfication - - - - - 148 



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