54 



THORAX 



terminalis. If the heart is pulled a little over to the left this 

 sulcus can be traced downwards, along the lateral aspect of 

 the right atrium, to the anterior aspect of the upper end of 

 the inferior vena cava. It indicates the separation between 



Right common carotid artery 

 Opening of right internal jugular vein , 

 ^ Right subclavian artery . 

 Right subclavian vein 



Left common carotid artery 



End of left internal jugular vein 

 : ; Left subclavian artery 



Left subclavian vein 



Innominate artery -5^ 



Superior vena cavs 

 Right phrenic ner 



Eparterial branch of 

 right bronchus 



Pulmonary artery 



Upper ri^ht pulmonary 



vein 



Right auricle 

 (O.T. appendix) 



Right atrium 



Inferior vena cava 



Left phrenic nerve 

 Cut edge of peri- 

 cardium 

 Ascending aorta , 



Root of pulmonary 

 artery. 



Coronary sulcus 

 (O.T. auriculo- 

 ventricular) 



Right ventricle 



Anterior longi- 

 tudinal sulcus 

 Left ventricle' 



Cut edge of 

 pericar- 

 dium 



FIG. 25. Dissection of the Middle and Superior Parts 01 the Mediastinum 

 from the anterior aspect. 



the venous sinus of the atrium, into which the great veins 

 open, and the cavity of the atrium proper. 



The whole of the right border of the heart is formed by 

 the right atrium. Its position can be indicated on the surface 

 by a line, convex to the right, which commences at the level 

 of the third right costal cartilage, half an inch from the 



