PHYSIOLOGY AND HYGIENE 

 PART I: THE VITAL PROCESSES 



CHAPTER I 

 INTRODUCTION 



To derive strength equal to the daily task ; to experience 

 the advantages of health and avoid the pain, inconvenience, 

 and danger of disease ; to live out contentedly and use- 

 fully the natural span of life : these are problems that 

 concern all people. They are, however, but different 

 phases of one great problem the problem of properly 

 managing or caring for the body. To supply knowledge 

 necessary to the solution of this problem is the chief reason 

 why the body is studied in our public schools. 



Divisions of the Subject. The body is studied from 

 three standpoints : structure, use of parts, and care or 

 management. This causes the main subject to be con- 

 sidered under three heads, known as anatomy, physiology, 

 and hygiene. 



Anatomy treats of the construction of the body the 

 parts which compose it, what they are like, and where lo- 

 cated. Its main divisions are known as gross anatomy and 

 histology. Gross anatomy treats of the larger structures 

 of the body, while histology treats of the minute structures 

 of which these are composed parts too small to be seen 

 with the naked eye and which have to be studied with the 

 aid of the microscope. 



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