SUBCLAVIAN ARTERIES. 



381 



cealed by tlie anterior scalenus muscle, forms the highest part of the 

 arch described by the vessel across the neck. Somewhat less deeply 



Fig. 25o. 



Fig. 255. — ^ViEw OF THE Right Common Carotid and k-cbciavian Arteries, wiin 



THE ORIGINS OP THEIR BRANCHES AND THEIR RELATIONS (R. Qualn). J 



For the explanation of the references in the upper part of this figure, see p. 3.16. 

 The following explanation relates to the suhclavian artery and its branches : 8, the first 

 part, 8', the third part, of the arch of the subclavian artery ; 8", the subclavian vein, 

 .shown by the removal of a portion of the clavicle ; 9, is placed on the scalenus anticus 

 muscle in the angle between the transverse cervical and suprascapular branches of the 

 thyroid axis ; 10, outer part of the suprascapular artery ; 1 0', transverse cervical branches 

 passing into the deep surface of the trapezius ; 10", the posterior scapular artery, 

 represented as rising directly from the third part of the subclavian artery, and passing 

 through the axillary plexus of nerves and imder the levator anguli scapul.T ; 11, on 

 the scalenus anticus muscle, j^oints to the inferior thyroid artery, near the place where 

 the ascending cervical artery is given off ; the phrenic nerve lies on the muscle to the 

 outside ; i, the supra-sternal twig of the suprascapular artery. 



