AXILLARY ARTERY. 



233 



Its connections with surrounding parts are numerous ; and the descrip- 

 tion of these will be methodized by dividing the artery into three parts 



one above, one beneath, and one below the small pectoral muscle. 



Above the small pectoral muscle the artery is contained in the axillary 

 sheath of membrane, E. This part is concealed by the clavicular portion 

 of the great pectoral muscle. Behind it are the intercostal muscles of the 

 first space and the first digitation of the serratus magnus. 



Fig. 70. 



SECOND VIEW OF THE DISSECTION OF THE THORAX (Illustrations of Dissections). 



Muscles : Vessels : 



A. Pectoralis major, cut. a. Acromial-thoracic branch. 



B. Pectoralis minor. 6. Long thoracic branch, 

 c. Serratus magnus. c. Subscapular branch. 



D. Subclavius. d. Axillary artery. 



E. Axillary sheath. e. Cephalic vein. 



p. Subscapularis. /. Brachial veins joining the axillary veins, g. 



G. Latissimus dorsi. Nerves: 



H. Teres major. 1 and 2. Anterior thoracic branches. 



j. Coraco-trachialis. 3. Subscapular branch. 



K. Biceps. 4. Nerve to the serratus. 



5. Intercosto-hunieral branch. 



To the thoracic side is placed the axillary vein (^7). The cephalic vein 

 (e), and offsets of the acromial thoracic artery and vein, cross over it. 



On the acromial side lie the two cords of the brachial plexus, separated 

 from the vessel by a slight interval. Superficial to it lies an anterior tho- 

 racic nerve ; and beneath, is the posterior thoracic. 



Beneath the pectoralis, the pectoralis minor and major B and A are 

 superficial to the axillary vessel. But there is not any muscle immediately 



