Xll 



CONTENTS 



CHAPTER PAGE 



Vll. (Optional.) Additional Animal Studies . . 175 



I. Porifera 175 



II. Coelenterata 176 



III. Annelida 179 



IV. MoUusca 181 



V. Reptiles 185 



VI. Mammals 187 



VII. Classification of. Animals 190 



HUMAN BIOLOGY 



I. General Structure of the Human Body 



II. 



III. 



Microorganisms and their Relation to Human 



Welfare 



I. Structure and Functions of Bacteria 

 II. Occurrence of Bacteria 



III. Bacteria as the Friends of Man . 



IV. Bacteria as the Foes of Man' 



Body 



Foods and their Uses . 



I. Food Substances found in the Human 



II. The Necessity for Foods 



III. The Composition of Foods 



IV. Uses of the Food Substances 

 V. Cooking of Foods . 



VI. Food Economy 



VII. Daily Diet . 



IV. Stimulants and Narcotics 

 I. Definitions . 

 II. Beverages 



III. Tobadco 



IV. Drugs and Patent Medicines 



V. Digestion and Absorption of the Nutrients 

 I. General Survey of the Digestive System 



10 

 10 

 14 

 20 

 23 



44 

 44 

 45 

 46 

 50 

 52 

 56 

 60 



64 

 64 

 65 

 75 



78 



82 

 82 



