Fig. 27. 



Superior thyroid vein 



Internal jugular vein 



Common carotid artery 



Vagus nerve 



Inferior thyroid artery 



Bulb of internal jugular vein 





Left innominate vein 



Internal mammary artery 

 Internal mammary vein 



First rib 



Fourth cervical nerve 



M. scalenus medius 



Phrenic nerve 

 Vertebral artery 

 M. scalenus ant. 

 Ascending cervical artery 



Eighth cervical nerve 

 Transversalis colli artery 

 P'irst thoracic nerve 



Posterior scapular artery 



External jugular vein 



-. Suprascapular artery 

 Subclavian artery 



Subclavian vein 



M. subclavius Acromio-thoracic artery 

 Clavicle Brachial plexus Costo-coracoid membrane 



Fig. 28. 



Thoracic branch of acromiothoracic artery 



Axillary ' vein 



7 M. pectoralis minor 



'1 Anterior thoracic nerves 

 J Cephalic vein 

 Axillary artery 



