Esophagus lies immediately posterior to the cartilage-free posterior wall of the trachea. Trachea is lined with pseudostratified ciliated columnar epithelium that contains numerous goblet cells. Cilia propel mucus and foreign particles toward the larynx where they can enter the esophagus and be swallowed. Bronchi OH-150 Larynx and Trachea Trachea divides into the right and left primary bronchi . Right bronchus is shorter and wider and is more vertical than the left bronchus.
Primary bronchi extend from the mediastinum to the lungs.