28 OUTLINES OF ANATOMY. 



Right lymphatic duct, 688, 692-3. (673, 677) 

 Subclavian artery, 536. (527) 



First portion of the right subclavian artery, 537. (528) 

 Relations : In front. 

 Behind. 

 Below. 

 Branches. 



The upper or cervical part of the first portion of the left subclavian artery will be exposed. The 

 origin from the aorta will be shown at another time. The relation to the sterno-mastoid should 

 be demonstrated by replacing the muscle in position. The right subclavian can be exposed from 

 its origin. 



Left subclavian artery, 536-7. (527-8) 

 Relations: In front. 



Behind. 



Right side. 



Left side. 



Second portion of the subclavian artery, 538. (528) 

 Relations: In front. 



Behind. 



Above. 



Below. 

 Branch. 



Third portion of the subclavian artery, 538-9. (529-30) 

 Relations: In front. 



Behind. 



Below. 



Above. 



Chief Variations in the Subclavian Artery. 



Expose the branches of the subclavian artery, and trace them to the point where they pass into 

 or under other structures; the terminal portion of such branches will be demonstrated later in the 

 process of the dissection. 



Branches of the subclavian artery, 540. (530) 

 First portion : Vertebral. 



Thyroid axis. 



Internal mammary. 



Second portion : Superior intercostal. 

 Third portion. 



Vertebral artery, 540. (530-1) 



The first, or cervical portion : 

 In front. 

 Behind. 

 Inner side. 

 Outer side. 



Chief Variations of the Vertebral Artery, 541. {532) 



Vertebral vein, 666. (653) 



Tributaries : Anterior vertebral vein. 



Deep cervical vein, 652. (639) 

 Thyroid axis, 545. (535) 

 Inferior thyroid. 

 Suprascapular. 

 Transverse cervical. 

 Inferior thyroid, 545-6. (536) 



Branches: Muscular branches. 

 Ascending cervical. 



Muscular. Spinal. Phrenic. 

 OEsophageal branches. 



