342 CELL INTELLIGENCE THE CAUSE OF EVOLUTION 



together for a certain purpose, and assigned a certain 

 work to do. 



The more highly organized any being becomes, the 

 more specialized and complex are the organs and the 

 work performed by them. In the lower beings like the 

 polyp there are no cells assigned to the special work of 

 receiving impressions and giving orders, and for that 

 reason this plant or animal, whatever you wish to call it, 

 has not what we call a nervous system : so if it is 

 touched it will act and pull in its tentacles, but its actions 

 are slow and from one tentacle to the other until they are 

 all in ; while in others just like it in appearance, but which 

 have cells arranged for the special work of receiving 

 sensations and giving orders, like the polyzoan, the ten- 

 tacles will all be pulled in quickly and at the same time. 



These animals have what we call a nervous system. 

 These nerve cells have no other work to do and they be- 

 come specially adapted for this specific work and are able 

 to notify all the cells to act at the same time. In the 

 same manner the organs of every being become adapted 

 or in other words adapt themselves to the particular 

 work assigned to them. 



The heart is a combination of cells arranged into 

 groups to form muscles, to push the blood in one con- 

 tinuous direction. The lung is a place where the cells 

 come in contact with the air, and breath and carry with 

 them enough oxygen for the stationary cells in the bone, 

 muscles, nerves, etc., whose work prevents them from 

 coming into direct contact with the air in the lungs. 

 There is at all times waste matter accumulating in the 

 blood, so the liver was organized, which is another 

 group of cells with the special work to do of removing 

 waste matter from the blood. This is also true of the 

 kidneys and the bladder. 



