Overview Conducting Airways "conducting zone" includes: nose nasopharynx larynx trachea login to view 2 more bullets bronchi login to view 2 more bullets bronchioles terminal bronchioles bring air into and out of lungs warm, humidify, and filter air anatomic dead space do not participate in gas exchange walls contain smooth muscle sympathetic and parasympathetic innervation regulates airway diameter login to view 1 more bullet Respiratory Airways "respiratory zone" includes: respiratory bronchioles login to view 1 more bullet alveolar ducts alveolar sacs login to view 2 more bullets participate in gas exchange structures are lined with alveoli exchange of oxygen and carbon dioxide between alveoli and pulmonary capillary blood occurs rapidly and efficiently across alveoli login to view 2 more bullets