SYSTEMATIC ANALYSIS OF THE BODY. 



FIG. 44. 



Fig. 44 illustrates one 

 class of blood-tubes, 

 called arteries, com- 

 mencing at H, the 

 heart, and dividing 

 and subdividing, ac- 

 cording to the mem- 

 bers, until all parts ot 

 the body are reached, 

 where they terminate 

 in the next class. The 

 capillaries are a net- 

 work of hair-like tubes, 

 too small to be seen by 

 the naked eye, into 

 which the arteries pour 

 their contents. They 

 are more numerous in 

 the brain than in any 

 other part. From the 

 capillaries the veins 

 commence (see PI. 5), 

 and uniting together, 

 and also receiving the 

 contents of the fourth 

 class of tubes, they at 

 last open into another 

 part of the heart, from 

 whence the arteries 

 lead out. The fourth 

 class of tubes, called 

 lymphatics (see PI. 5*), 

 commences in every 

 part except the brain 

 and nerves, and open 

 into the veins, and 

 thus their contents find 

 their way to the heart. 



FIKST MEMBER OF THE BODY. 



30. THE DEVELOPMENT OF THE MIND, therefore, 

 requires the use of that beautiful collection of similar 

 parts, called the Brain, Brains, or Mental Ganglia, in the 

 hidden recesses, and by means of which, in the most 



Describe Fig. 44. What member of the Body is now to be treated upon? 

 80. What does require? 



