THE CELL THEORY. 2 



whole organism is the result of the methods of growth, 

 reproduction, and grouping of the cells. 



These views of the cell place its study at the foun- 

 dation of structural (morphological), of physiological, 

 and of what may be termed the philosophical studies 

 of organisms. 



While for the conceptions above set forth the cell 

 may be taken as the unit, it must be kept in mind 

 that the cell itself is of very complex organization. It 

 has parts, each with its special properties and func- 

 tions. The cell is the unit in the sense that its parts 

 live and act only in the relations in which we find 

 them organized in the cell. While a single cell may 

 live alone, its parts cannot do so. In the growth 

 and development of the organism the advancement is 

 made by the repetition of the whole cell as the unit. 



i W W. LOCAL, 174 



569 - 7TH STRE 



OAKLAND. C 



