Bronchus

Two main bronchi branch from the trachea to supply the left and right lung. The main bronchi branch to form secondary bronchi and the branching process continues to form smaller and more numerous bronchi. Bronchi contain a pseudostratified epitheium with similar cellular composition as the trachea. The basement membrane is much thinner than in the trachea, but glands are still found in the submucosa. Bronchi are easily identified by their cartilage plates.