45- 



First thoracic vertebra 



Superior 

 vena 

 cava 



I>eft internal jugular vein 

 Left subclavian vein 

 Left innominate vein 



Pulmonary artery 



Ascending aorta 



Pulmonic opening 



...Aortic opening 



Left auriculo-ventricular 

 opening (mitral valve) 



Right auriculo-ventricular 

 opening (tricuspid valve) 

 Cardiac notch of the border 

 of the left lung 



- Absolute cardiac dulness 



Mammillary line 



Axillary line 



