Alveolar enlargement simulator

■ The simulator shows the branching of bronchioles, respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli. The alveolar sacs show their cross-sectional structure and display the bronchial arteries and veins, pulmonary arteries and veins, capillary network, pulmonary membrane, smooth muscle, elastic fibers, and reticular fibers.