THORACIC CAVITY 



39 



position of the conus arteriosus and the stem of the pulmonary 

 artery, and the same portion of the pericardial area on the 

 right side corresponds with the position of the lower part of 

 the superior vena cava posteriorly and with the ascending 

 aorta anteriorly (Fig. 17). Below and posterior to the lower 



Groove for right subclavian artery 



Groove for lower end of internal _ 

 jugular vein 



Groove for ist rib 



Groove for superior ^_ 

 vena cava 



Groove for ascending mL 

 aorta 



Depression for 

 right atrium 



CEsophageal area 

 Tracheal area 



Groove for azygos 

 vein 



Groove for 

 azygos vein 



Groove for 

 oesophagus 



Groove for in- 

 ferior vena cava 

 Pulmonary 

 ligament 



FIG. 17. The Medial Surface of a Right Lung hardened in situ. 



and posterior part of the pericardial area on the right lung is a 

 secondary depression due to the upper part of the inferior 

 vena cava. Posterior to the pericardial area and the hilus 

 there is a narrow strip of the mediastinal surface of the lung 

 which is in relation with the lateral wall of the posterior 

 mediastinum. On the right lung this portion of the 

 surface presents a longitudinal depression which corresponds 

 with the right border of the oesophagus, and more posteriorly 

 at the upper part there may be a groove caused by the vena 



