232 



THE VASCULAR SYSTEM. 



c. The Art. scapularis posterior (Fig. 150, 3), a small branch 

 arising opposite at the tip of the second transverse process and 

 passing backwards over the MM. transv erso-scapulares, to which it is 

 distributed. 



d. The Art. scapularis superior (Fig. 150, 4) accompanies several 

 nerves between the M. subscapularis, M. transverso-scapularis major, 



Fig. 151. Fig. 152. 



Arteries of the palmar surface of the hand. 



R Ulnar artery. 



ci R. cutaueus medialis inferior. 



d Digital branches. 



F M. flexor digitorum cominunis. 



II Thumb. 



Aiteriei of the dorsal surface of the hand. 



B Ulnar artery. 



cri R. cutan. rad. inferior. 



H Radial artery 



// Thumb. 



V Fifth finger. 



V Fifth finger. 



and the long head of the M. triceps towards the dorsal surface, 

 where it is distributed to the MM. infraspinatus, latissimns dorsi, etc. 



e. The Hamus cutaneus maxillaris. 



f. The Art. subscapularis (Fig. 150, 6) is distributed in the sub- 

 scapular muscle. 



A. The brachial artery (Arteria Irachialis], (Fig. 150) accom- 

 panies the brachial nerve under cover of the long head of the 

 M. triceps and over its inner head to the Plica cubiti, into which it 

 sinks near the tendon of the M. sternoradialis ; beyond this point it 

 is continued as the ulnar artery. In its course the brachial artery 

 gives off : 



a. The Arteria pectoralis (Fig. 150^5). 



b. The Arteria cutanea medialis superior (Fig. 150 c}. 



c. The radial artery (Arteria radialis\ (Fig. 150 E] which winds 



