Remember that the pharynx is at a crossroads from which leads off, at the top, the passage to the mouth cavity and the passage to the nasal cavity, and below, the passage to the larynx.
Roman JakobsonLanguages differ essentially in what they must convey and not in what they may convey.
Roman JakobsonSpeech sounds cannot be understood, delimited, classified and explained except in the light of the tasks which they perform in language.
Roman Jakobson