i INTRODUCTION 9 



10. The nervous system, which controls all parts of 

 the body and forms the organ of the human mind, will 

 be treated next. 



n. In close relation to the nervous system stand the 

 sense organs that enable us to see, hear, taste, smell, 

 and feel. 



12. We shall then study some of the more common 

 diseases to see how they are caused, how they spread, 

 and how they may be warded off. 



13. This will be followed by a chapter on public 

 health and personal hygiene, based on our knowledge 

 of the human body as learned in studying this book. 



This order of topics we shall find easy to follow, for 

 it is a very natural way of studying the human body. 

 It will make the whole subject easy to understand, and 

 at the same time very interesting, because one thing 

 grows right out of another. 



SUMMARY OF THE MAIN POINTS 



1. A study of the human body will enable us to understand 

 its parts, how they work, and how to keep well. 



2. The human body is a very complex organism, being com- 

 posed of many parts, each having its own needs and doing its 

 own work for the common good. It is a wonderful machine. 



3. Anatomy is the science which deals with the gross or 

 general structure of the human body. 



4. Physiology is the science which deals with the uses of 

 the different parts of the body. 



5. Hygiene is the science and art of health. It tells how to 

 get well, and how to keep the body in a healthy condition all 

 the time. 



