84 CELL INTELLIGENCE THE CAUSE OF EVOLUTION 



required to build the new structure. I must further de- 

 scribe the male cell, who makes elaborate preparation to 

 be able, not only to meet the female cell, but to be able to 

 be the first one to reach her in the mighty race and strug- 

 gle that takes place between a thousand or more of them 

 in a dash for the goal. 



The male cells, or spermatozoons, who prepare to meet 

 the female cells in the womb, change their form so com- 

 pletely that no one not familiar with them could possibly 

 recognize them as a human cell. They were thought 

 to be parasites when first discovered and not in any way 

 connected with or a part of the body. The male cell is re- 

 constructed to effect a certain purpose, which is to push 

 its way through obstacles in a competitive race that is 

 to take place by thousands of individuals at the same 

 time. To be swift and effective, the centrosome is placed 

 in front, protected by a hard point; next, back of Kim is 

 the entire crowd of skilled workers known as the nucleus ; 

 then back of them there is a powerful tail or propeller, 

 constructed from the common workers and laborers of his 

 whole body, which is designed to push the male cell 

 with the centrosome in front, directing the course to the 

 place where the female cell is waiting for him in the 

 womb. 



The following is a description from Prof. Wilson of the 

 male cell generally called the spermatozoon : '"In its 

 more usual form the animal spermatozoon resembles a 

 minute, elongated tadpole, which swims very actively 

 about by the vibrations of a long slender tail. Such a 

 spermatozoon consists typically of four parts. Fig. (8). 



First The nucleus, which forms the main portion of 

 the head and consists of a very dense and usually homo- 

 geneous mass of chromatin staining with great intensity. 

 It is surrounded by a very thin cytoplasmic envelope. 



