THORAX 



the vagus nerve ; and posterior to the lung root is the vena 

 azygos. At a lower level, posterior to the pericardium, the 



M. scalenus niedius 

 M. scalenus anterior 



Brachial plexus 



Cut edge of costal part 

 of parietal pleura 



Second right aortic 



intercostal artery 



in fourth space 



Vena azygos 

 Sympathetic trunk 

 End of right 

 bronchial vein 

 Branch of pul- 

 monary artery 

 Eparterial branch 

 of bronchus 

 Posterior pu 

 monary plexus 



Hyparterial part 

 of bronchus 



L.ower right pul 

 monary vein 



Sulcus terminalis 

 of right atrium 



Greater splanch 

 nic nerve 



Inferior vena 

 cava 



Lesser splanchnic 

 nerve 



Right phrenic nerve 



Right common carotid artery 



Right subclavian artery 



subclavian vein 

 - First rib 



(Esophagus 



"Trachea 

 Right vagus nerve 

 - Right phrenic nerve 



_ n Cut edge of costal part 

 of parietal pleura 



r~~ Superior vena cava 



Internal mam- 

 mary artery 

 Cut edge of peri- 

 cardial part of 

 parietal pleura 

 Cut edge of peri- 

 cardium 



Right atrium 



Diaphragm 



FIG. 13. Dissection of Thorax from right side showing the constituent parts 

 of the middle, superior and posterior mediastina. 



right margin of the oesophagus will be found anterior to the 

 vena azygos. Lateral to the vena azygos, on the sides of the 



