The left lung
1. Left lung, superior lobe
2. Left lung, inferior lobe
3. Medial surface
4. Diaphragmatic surface
5. Cardiac impression
6. Hilum of the lung
The left lung. Observe the position of the superior (1) and inferior (2) lobes and the medial (3) and diaphragmatic (4) surfaces. Notice the cardiac impression (5) harbouring the heart and the pulmonary hilum (6).