The most complex of its family of nerves, it stimulates secretion of stomach and pancreatic juices, contributes motor impulses to muscles in the larynx and pharynx, controls involuntary muscles in the bronchi, esophagus and small intestine, in addition to its more well-known function of slowing heart rate.  
Though it has two sensory ganglia, its only sensory function is for a tiny area around the opening of the external ear.  The most complex of its family of nerves, it stimulates secretion of stomach and pancreatic juices, contributes motor impulses to muscles in the larynx and pharynx, controls involuntary muscles in the bronchi, esophagus and small intestine, in addition to its more well-known function of slowing heart rate.  FTP, identify this tenth and longest of the cranial nerves.
Though it has two sensory ganglia, its only sensory function is for a tiny area around the opening of the external ear.  
vagus nerve  (prompt on tenth cranial nerve on an early buzz)