CONTENTS 



CHAPTERS I— III 



PAGE 



Response — the Manifestations of Vital Activity 



I. Muscular Contraction ....... i 



II. Ciliary Activity, Amoeboid Motion and Colour Response . 23 



III. Secretion ......... 47 



CHAPTERS IV— VI 



Metabolism— THE Sources of Vital Energy 

 IV. Respiration ......... 64 



V. Nutrition 85 



VI. The Circulation of Body Fluids . . . . , loi 



CHAPTERS VII- IX 



Co-ordination — the Integration of Vital Activities 



VII. Endocrine Co-ordination 118 



VIII. The Mechanism of Nervous Conduction and Excitation . 134 

 XI. The Analysis of Behaviour in Animals . . . • 151 



CHAPTERS X— XII 



Reproduction — the Building up of a New 

 Animate Unit 



X. The Fertilisation of the Egg ...... 169 



XI. Inheritance ......... 182 



XII. The Physiology of Development ..... 200 



