a: Gross anatomy of lung and thorax. b: Microscopic anatomy of bronchial wall. C: View of terminal airway and alveoli. d: Alveolar structure.

The proximity of respiratory and GI tract has resulted in a complex set of morphologic and reflex adaptations that permit separation of respiratory and GI functions in the aerodigestive tract.

Inspiratory reserve volume is the maximum amount of additional air that can be taken into the lungs after a normal breath. Expiratory reserve volume is the maximum amount of additional air that ...