ANIMAL LIFE ASSIMILATION. 397 



phagocytes), for the evident purpose of at- 

 tacking any foreign trespasser, bacterion or 

 other assailant, who may be met with on the 

 way. The lymphatic vessels, after completing 

 the round of the body are collected into two 

 main ducts which empty into the jugular 

 veins, whence is repeated the cycle through 

 the blood, capillaries and lymph. Thus the 

 Circulatory System as a whole is composed 

 of three parts, arterial, venous, lymphatic. 

 The perfect blood, flowing to the capillaries, 

 does there its work, and is separated into its 

 venous and lymphatic parts, each of which 

 in its way returns to the primal perfect 

 blood by a new distribution through lungs, 

 heart, arteries. Such we may call the process 

 of circulation whose function is to distribute 

 in its round the store of sustenance prepared 

 by digestion. The Circulatory System is 

 thus a kind of middle-man or mediator to the 

 Organism, strictly producing no food, though 

 cooking it over, and then carrying it to the 

 consumer. Compared to the social order, di- 

 gestion is the farmer, while circulation is the 

 merchant. Indeed the farmer gets his food 

 products from the elements, while digestion 

 gets them from the farmer chiefly. 



Finally is the Execretory System which has 

 to clean up and carry off what is called the 

 waste of the body, to eject the rejected mate- 



