CHAPTER XI 



THE VASCULAR SYSTEM CONTINUED: ARTERIES; PULMONARY 

 SYSTEM; GENERAL SYSTEM; VEINS; SUPPLEMENTARY 

 CHANNEL, AND PORTAL SYSTEM 



ARTERIES 



The arteries, which carry and regulate the supply of blood from 

 the heart to the capillaries, are distributed throughout the body 

 i^ a systematic manner, and before taking up the circulation, we 



ANASTOMOSIS 



ECURTIENT 

 BRANCH 



Fig. 116. — Diagram showing the Branchings, Anastomoses, and Conflu- 

 ence OF Arteries. (Gerrish.) 



must try to gain a general idea of this system of distribution, in 

 order that we may be able to locate the position of these important 

 vessels. The arteries usually occupy protected situations, that they 

 may be exposed as little as possible to accidental injury, or to the 

 effects of local pressure. 



184 . 



