This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surfaces and Grooves, Subject name: Anatomy
Mediastinal surface of right lung is related to 
Select and explain. 
A. Azygos vein, B. Right lymphatic duct, C. Aoa, D. Trachea
A: Azygos vein
Answer: A: Azygos vein 
Explanation: > (because hea & its blood vessels should be preferred first as an answer as they cause direct impression on lungs). * mediastinal surface of Right lung contains Left lung contains Hea (right atrium) Superior vena cava Inferior vena cava Azygos vein Esophagus Right subclan aery & vein arch over and are related to superior lobe of right lung. Hea (left ventricle) Aoic arch Thoracic aoa Esophagus Left subclan aery & vein arch over & related to superior lobe of left lung. fig;- major structure related to mediastinal surface of right lung Right lymphatic duct - not related to lung Thoracic duct - related to left lung mediastinal surface But they do not put great impression on lungs * Trachea is more towards right lung * Esophagus is more towards left lung