206 



Arteria axillaris. 



jl.transv.colU. 



M.levator 

 scap 



l.circiunflcxa 

 ant. 



A., transit scapulae 

 R.acromial. 



550. The Arteries of the Shoulder. 



Further branches of the axillary artery are : 



cl) The alar thoracic, Art. thoracica alar is, to the glands and 

 areolar tissue of the axilla; not constant. 



e) The subscapular, Art. sul> scapular is, which distributes two 

 or three upper, smaller, and one lower, larger branch, to the muscles 

 in its neighbourhood. The lower gives off the Eamus thoracico-dorsalis, 

 which runs parallel to the outer border of the scapula and passes to the lower 

 dentations of the M. serratus maynus and to the costal origins of the il/. latis- 

 simus dor si and the Art. circumflcxa scapulae, which passes between the 

 ]\[. subscapularis and tcrcs major to the posterior surface of the scapula; 

 it supplies the muscles in the infraspinous fossa. 



f) The anterior circumflex. Art. circumflcxa liumcri anterior, 

 passes in front of the surgical neck of the humerus. 



g) The posterior circumflex, Art. circumflexa humeri posterior, 

 much the larger, passes behind the surgical neck close to the bone. 

 Both supply the soft parts at the shoulder joint and anastomose with 

 each other. 



