CONTENTS 



CHAPTER 



I. INTRODUCTION . . . 



PART II. ANIMAL BIOLOGY 



UCTION . . . 



II. PROTOZOANS . 



. . 10 



III. SPONGES 



IV. POLYPS 



V. ECHINODERMS . 



VI. WORMS . 



42 



VII. CRUSTACEANS 



VIII. INSECTS 6 



IX. MOLLUSKS 



X ' FISHES - I09 



XI. BATRACHIANS I2 g 



XII. REPTILES 



XIII. BIRDS . 



XIV. MAMMALS TQ , 



. 154 



PART III. HUMAN BIOLOGY 

 I. INTRODUCTION 



I 



II. THE SKIN AND KIDNEYS .... x6 



III. THE SKELETON 2 



IV. THE MUSCLES 39 



V. THE CIRCULATION 5I 



VI. THE RESPIRATION . . . . . . . . 70 



VII. FOOD AND DIGESTION go 



VIII. THE NERVOUS SYSTEM ... . . . II7 



IX. THE SENSES I42 



X. BACTERIA AND SANITATION I5 8 



GENERAL INDEX 



