<prompt> Function of larynxSpeechProtection of airwayConduit of airAll  <response>: Ref BDC volume3,6th edition pg 252The larynx is the organ for production of voice or phonation.It is also an air passage and acts as a sphincter at the inlet of the lower respiratory passages.The upper respiratory passages include nose and oral cavityNOTES; Our speech is guided and controlled by cerebral coex. 