Mediastinal Surfaces of the Lungs Presented, Inferior View

Description

Oriented in an inferior view, the right and left lungs are presented with their medial (mediastinal) surfaces facing the viewer, so the hilum sits near the center of each lung while the anterior borders curve toward the sternum and the posterior borders sweep back toward the vertebral column. The oblique fissure is emphasized as a deep cleft running from a posterior-superior origin toward an anterior-inferior termination, separating the superior lobe from the inferior lobe on both sides. On the right lung, the more complex lobar pattern is implied even from below by the relationship of the oblique fissure to the middle lobe, which lies anteriorly and inferiorly relative to the superior lobe and contacts the mediastinal surface. Left-right asymmetry reads clearly. Even without external landmarks, the medial contour anticipates the cardiac impression on the left and the broader mediastinal contact on the right. Seeing the fissures from underneath helps you teach why pleural fluid layers dependently and why basal segments are often involved in aspiration and atelectasis, while the lobar boundaries still matter for drainage, ventilation distribution, and surgical planning. This perspective also supports interpretation of lobar collapse patterns on chest radiography and CT, where fissural displacement is a key sign, and it reinforces that interlobar planes guide VATS fissure-first versus fissure-last approaches and reduce prolonged air leak when the fissure is incomplete. Small clefts, big consequences. Use this illustration in thoracic anatomy labs, respiratory block lectures, and radiology teaching files that correlate fissure anatomy with lower-lobe consolidation, pleural effusion, or post-lobectomy changes. It also fits surgical atlases and patient-facing education on lobectomy or segmentectomy when you need a clean view of medial lung surfaces and the oblique fissures. Anatomical accuracy verified by SciePro's Medical Advisory Board.