[ToC]

 

AN IDEALIZED CROSS-SECTION THROUGH THE BODY OF A WHITE STORK SHOWING THE LUNG AND AIR CONNECTIONS

Joel Carl Welty, The Life of Birds, W. B. Saunders Co., 1962

At the middle left is the sectioned trachea (dark oval) and the adjacent syrinx. A primary bronchus (2) connects with the lungs (6) by means of the ventrobronchi (3). Dorsobronchi (4) connect the dorsal surface of the lungs with the primary bronchus. The dorsobronchi and ventrobronchi are connected in the lungs by the minute parabronchi (6); this is where gas exchange between the inhaled air and the blood occurs. The abdominal air sac (E) is directly connected with the primary bronchus; the posterior thoracic air sacs (D) join the primary bronchus through the laterobronchi (5). Diagram courtesy of H.-R. Duncker (1971) and Springer-Verlag