Main Menu » Organs & Systems » Respiratory » Intrapulmonary Passageways » Conducting Secondary Bronchus Secondary bronchus 1 Secondary bronchus 3 Secondary bronchus 2 Secondary bronchus 4 Secondary bronchus 6 Secondary bronchus 5 Secondary bronchus 7 Bronchiole Bronchiole 1A Bronchiole 2A Bronchiole 3A Bronchiole 4A Bronchiole 5A Bronchiole 6AA Bronchiole 7A Bronchiole 8A