AND PHYSIOLOGY. 



209 



the ulna and radius. Some- 

 times, however, the branch- 

 ing takes place higher up, as 

 is seen in cut 212. When 

 these have fairly passed the 

 wrist, they both join again in 

 an artery which describes a 

 curve at the base of the meta- 

 carpus crossing the palm of 

 the hand, and called the Pal- 

 mar Arch. Small branches 

 are given off from this which 

 supply the different parts of 

 the hand, including the fin- 

 gers and thumb. 



373. Distribution of the 

 Carotids — Vertebral — Circle 

 of Willis.— The common Ca- 

 rotid Arteries, one on each 

 side of the neck, pass upwards 

 from the innominata and sub- 

 clavian nearly as far as the 

 angle of the jaw, when they 

 divide into the internal and 

 external carotids, the Litter 

 furnishing blood to the face, 

 and the former to the brain and 

 back part of the head. The 

 Vertebral Artery is also giv- 

 en off from the sub -clavian, 

 which, passing backward, en- 

 ters the spinal column at the 

 sixth cervical vertebra, and 



Deep-Seated Palmar Arch. 9, The Anc 



FlG. 212. 



Arteries of the Arm. 1, Termination of 

 the Axillary Artery. 2, The Brachial Ar- 

 tery. 3, 3, Eadial Artery. 4, 4, Ulnar Ar- 

 tery. 5, A Recurrent Branch. 6, Anterior 

 Interosseous Artery. 7, Superficial Pal- 

 mar Arch formed by the Ulnar Artery. 8, 

 •inosis of the two Arteries, much enlarged. 



' "What is the Palmar Arch? 373. Give the branches of the Carotid as it passes up- 

 ward to the head. 



