Fig. 161. Dissection (dog) showing the position of the left pulmonary vessels and the 

 sympathetic trunk in the chest above the diaphragm. Ms, mediastinum; Jl/T 1 , mammary 

 vessels (seen through the mediastinal membranes); T, thymus; / ', vagus trunk; Pa, left 

 pulmonary artery; Pvs, left pulmonary veins; H, heart covered over by the pericardium. 

 The connection of the pericardial sac to the diaphragm is torn loose from the diaphragm 

 at the edge, P; Ph, left phrenic nerve lying on the pericardium; Lit, lower lobe of The 

 left lung; V, V, branches of the vagus trunks on the esophagus, Oe; Ao, aorta; Sy, sym- 

 pathetic trunk; D, D, diaphragm; /."', liver; S, edge of stomach. 



