112 



PLATE LVI. 



STRUCTURES 



A Posterior portion of the parietal layer 



of pleura. 

 B (Esophagus. 

 C Trachea. 

 D Right bronchus. 

 E Left bronchus. 

 F Thoracic duct. 

 G Posterior wall of pericardium, the left 



pleura being slightly retracted in 



order to expose more of it. 



H External intercostal muscles, 

 t Posterior mediastinal lymphatic 

 glands. 



Note. The ribs on both sides are 

 numbered in Roman figures. 



VESSELS 



a Placed on thoracic aorta. 



6 End of transverse portion of aortic 

 arch (placed about the position of). 



c Left subclavian artery. 



d Superior intercostal branch of sub- 

 clavian. 



e Profunda cervicis, a branch of superior 

 intercostal. 



/ Anastomosis between superior and 

 first aortic intercostal. 



g Aortic intercostals, 



h Bronchial arteries which on both 



sides were given off from the- 



superior intercostals. 

 i Azygos major vein. 

 k Azygos minor vein. 

 I Left upper azygos vein. 

 m Superior intercostal vein of right side. 

 n Superior intercostal vein of left side, 

 o Intercostal veins. 



NERVES 



1 First dorsal nerve. 



2 Its intercostal branch. 



8 Main trunk of sympathetic. 



4 Communication between first dorsal 



and first dorsal ganglion. 



5 Great splanchnic. 



6 Roots of great splanchnic from the 



dorsal ganglia, commencing in this- 

 case at the sixth. 



7 Right vagus passing down to gain 



resophagus and break up into the- 

 plexus gula>. 



