ASCENDING AORTA ARCH. 



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Plan of the relations of the ascending Aorta. 



In Front. 

 Pericardium, 

 Thoracic fascia, 

 Pulmonary artery. 



Right Side. 

 Superior cava. 

 Right auricle. 



Ascending Aorta. 



Left Side. 

 Pulmonary artery, 

 Left auricle. 



Behind. 



Right pulmonary artery, 

 Right pulmonary veins. 



Arch. The upper border of the arch is parallel with the upper 

 border of the second sterno-costal articulation of the right side in 

 front, and the second dorsal vertebra behind, and terminates opposite 

 the lower border of the third. 



The anterior surface of the arch is crossed by the left pneumo- 

 gastric nerve, and by the cardiac branches of that nerve, and of the 

 sympathetic. 



The posterior surface of the arch is in relation with the bifurca- 

 tion of the trachea and great cardiac plexus, the cardiac nerves, left 

 recurrent nerve, and the thoracic duct. 



The superior border gives off the three great arteries, viz. the in- 

 nominata, left carotid, and left subclavian. 



The inferior border, or concavity of the arch, is in relation with 

 the remains of the ductus arteriosus, the cardiac ganglion and left 

 recurrent nerve, and has passing beneath it the right pulmonary 

 artery and left bronchus. 



Plan of the relations of the arch of the Aorta. 



Above. 



Arteria innominata, 

 Left carotid, 

 Left subclavian. 



In Front. 



Left pneumogastric nerve, 

 Cardiac nerves. 



. Arch 

 of the Aorta. 



Behind. 



Bifurcation of the trachea, 

 Great cardiac plexus, 

 Cardiac nerves, 

 Left recurrent nerve, 

 Thoracic duct. 



Below. 



Cardiac ganglion. 

 Remains of ductus arteriosus, 

 Left recurrent nerve, 

 Right pulmonary artery, 

 Left bronchus. 



The descending aorta is subdivided, in correspondence with the 

 two great cavities of the trunk, into the thoracic and abdominal 

 aorta. 



The thoracic aorta is situated to the left side of the vertebral 



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