

THE WOK 1. 1) OF LIFE 7 



out of chaos, and the way in which this is accomplished we 

 shall consider in the following chapter. 



It will be evident at once that a classification laying any 

 claims to accuracy must be based on as minute a knowledge as 

 possible of individual animals, their structure, their behavior, not 

 only to one another, but to the entire organic and inorganic world, 

 their development, their past history on this earth, and their 

 present distribution on it. Each of these subjects thus becomes 

 a matter for research, a science in itself, but all really branches 

 of the greater science of zoology. Nearly all of the various 

 medical sciences are in fact branches of zoology and botany. 

 For the sake of convenient reference the following diagram has 

 been placed here to show the general relation of some of the 

 more important specialized sciences to zoology and botany, 

 while the student is referred to the appendix for a description 

 of their particular fields of investigation. 



Biology. 



Morphology. 



Physiology. 



-gy- 



f Anatomy. 



Histology. 



Taxonomy. 



Distribution. 

 -I Palasontolo; 



Teratology. 



Phylogerry. 



Embryology. 



Pathology. 



Physiology. 



Ecology. 



1 "1 



Botany. 



Psycholo: 



£>•• 



Zoology. J 



r Biology. 



