CHAPTER XIV 

 HOW THE ANIMAL LIVES 



JAMES LAW 



1. The Cell, and Its Part in the Vital 



Processes 

 la. The cell 



355. The element in the body that carries on 

 vital processes is the cell ; for life in the animal, 

 like life in the plant (Chap, viii.), is dependent 

 on the existence of cells. Each animal cell is 

 a soft, jelly-like substance, held together by 

 an exceedingly delicate network of fibers. It 

 might be compared to a microscopic particle of 

 raw white of egg. 



16. Single -celled animals 



356. The lowest animals in the scale of 

 existence are formed of a single cell, which in 

 itself performs all the functions of life. This 

 cell can move from place to place, by flowing 

 out from its original globular form, so as to 

 make a projecting arm, and by continuing to 

 flow in the same direction until its whole 

 substance has passed into the new position. 



(208) 



