THE HUMAN BODY. *'- 



CHAPTER I. 



THE GENERAL PLAN ON WHICH THE HUMAN BODY IS 



BUILT. 



1. Why we should Learn about our Bodies. Suppose 

 you had given to you a delicate instrument, such as a 

 watch: you would desire to be told something of the way 

 it was made, how it was to be used, and what was apt to 

 harm it. Even a little knowledge of these things would 

 help you to take better care of the watch. 



Now every one of us is responsible for the care of a 

 body made up of many more parts than we find in a 

 watch, and any of them liable to be injured in number- 

 less different ways. If all the parts work well we are in 

 health, able to enjoy our lives, do our work, and aid those 

 who are less fortunate. If we lose our health we not 

 only can do less and enjoy less ourselves, but are likely 

 to become a burden upon others. It is therefore one of 



I. If you have a watch, what ought you to know of it, and why? 

 What is the nature of the machine given to every human being to 

 take care of? If it is kept in good order, what is the result? If not? 

 What then is our duty with regard to it ? 



