Use the key choices to match the following definitions with the correct terms: Smallest respiratory passages Separates the oral and nasal cavities Major nerve stimulating the diaphragm Food passageway posterior to the trachea Closes off the larynx during swallowing Windpipe Actual site of gas exchange Pleural layer covering the thorax walls Autonomic nervous system nerve serving the thorax Opening between vocal folds Fleshy lobes in the nasal cavity that increase its surface area Close the glottis during Valsalva's maneuver Closes the nasopharynx during swallowing The cilia of its mucosa beat upward toward the larynx A. Vagus B. Palate C. Uvula D. Epiglottis E. Trachea F. Esophagus G. Phrenic H. Glottis I. Bronchioles J. Vocal folds K. Parietal L. Trachea M. Alveoli N. Conchae