I024 



A MANUAL OF ANATOMY 



left side of the vertebral column, it subsequently takes up a position 

 in front of it. 



Relations — Anterior. — From above downwards, the root of the 

 left lung; the pericardium; the oesophagus; and the vertebral por- 



Trachea 



Innominate . 

 Artery 



Rt. Superior — 

 Intercostal 

 Artery 



Arch of. 

 Aorta 



Left Common Carotid Artery 



Scalenus Anticus Muscle 



Left Pneumogastric Nerve 



Left Subclavian Artery 

 (Third Part) 

 .. Left Phrenic Nerve 



Left Superior Intercostal 

 Artery 



Cervical Cardiac Branches 

 of Left Symp. and Vagus 



Superficial Cardiac 

 Plexus 



Left Bronchus 



Descending 



Thoracic 



Aorta 



Fig. 422. — Dissection of the Posterior Wall of the Thorax. 



tion of the diaphragm. Posterior. — ^The bodies and intervertebral 

 discs of thoracic vertebrae below the fourth ; and the upper and 

 lower transverse azygos veins. Right.— The oesophagus, superiorly ; 

 the thoracic duct ; and the right azygos vein. Left. — ^The left pos- 



