Anatomy of The Right Lung

lower lobe. Of course these impressions are the impressions of the rips that's why this surface is called costal. Now when we go to the medial side of the mediastinal surface of the lung. Of course this is the hilum of the right lung and as in the left, there is the inferior pulmonary vein the lowest structure of the hilum the most anterior structure at the hilum is the superior pulmonary vein and this is one of the tributaries of the superior pulmonary vein. And of course these are the branches of the right bronchus because the right bronchus is divided before entering the hilum of the lung into two branches, upper bronchus and lower bronchus and between the upper and lower bronchi there is the pulmonary artery that's why this bronchus is called eparterial bronchus that's above the artery and the lower bronchus is called hyparterial bronchus because it's below the artery so again the structure at the hilum, we have the inferior pulmonary vein the lowest, the superior pulmonary vein the most anterior, we have the highest structure which is the upper bronchus, also we have the lower bronchus and between the two bronchi we have the pulmonary artery, this bronchus is called eparterial because it is above the artery and this bronchus is called hyparterial because it is below the artery. The mediastinal surface is related to the right side of the mediastinum and this impression is called the cardiac impression which is related to the right atrium of the heart going into the right atrium there is the inferior vena cava, this groove is for the inferior vena cava going up to the right atrium going down to the right atrium there is the superior vena cava and of course the upper continuation of the superior vena cava is the impression for the right innominate vein or the brachiocephalic vein. Going into the middle of the superior vena cava, there is the arch of the azygos vein. This is the azygos vein which arises in the abdomen from the inferior vena cava, behind the hilum grooving the hilum from the back and then it forms an arch that terminates into the middle of the superior vena cava that's why the azygos vein forms and anastomosis between the inferior and superior vena cava. It arises from the inferior vena cava while it is present in the abdomen, it forms a cavo caval shunt because it terminates in the superior vena cava. Behind the innominate vein and the superior vena cava , this flat area is related to the trachea and behind the trachea there is the oesophagus and of course the oesophagus descends medial to the azygos arch and anterior to the azygos vein, this area. So trachea then we have the oesophagus descending medial to the azygos arch and anterior to the azygos vein behind the hilum. The area anterior to the superior vena cava and innominate, this area flat area is alos related to the thymus gland and to the ascending aorta. This is all about the right lung