Introduction The tasks of Oto-Rhino-Laryngology (ORL) Study: ORL and esophagus, trachea and bronchi--anatomy physiology and diseases 1, The function & features of organs in ORL Special function: audition, olfaction, sense of taste, balance Physiologic function: respiratory function, phonatory function and deglutitory function, immune defensive function Ordinary diseases: otitis media, rhinitis and sinusitis pharyngitis and tonsillitis, laryngitis, deafnessIntroduction The tasks of Oto-Rhino-Laryngology (ORL) Study：ORL and esophagus, trachea and bronchi—anatomy, physiology and diseases 1、The function & features of organs in ORL Special function：audition, olfaction, sense of taste, balance Physiologic function：respiratory function，phonatory function and deglutitory function，immune defensive function. Ordinary diseases：otitis media, rhinitis and sinusitis, pharyngitis and tonsillitis, laryngitis, deafness