Main Menu » Organs & Systems » Respiratory » Intrapulmonary Passageways » Respiratory Overview of respiratory intrapulmonary passageways Respiratory Bronchiole Respiratory Bronchiole 1 Respiratory bronchiole 2 Respiratory bronchiole 3 Respiratory bronchiole 4 Respiratory bronchiole 5 Respiratory bronchiole 6 Respiratory bronchiole 7 Alveolar Duct Alveolar duct 1 Alveolar duct 2 Alveolar duct 3 Alveolar duct 4 Alveolar duct 5 Alveolar duct 6 Alveoli Alveoli 1 Alveoli 2 Alveoli 3 Alveoli 4 Alveoli 7 Alveoli 5 Alveoli 6 Alveoli 8