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Respiratory System (Upper Respiratory Tract (nasal cavity (olfactory…

- - - - produce mucous
      - resonance chambers for speech
      - lighten skull
      - frontal,sphenoid ethmoid, maxillary bone
  - - - nasopharynx: superior region behind nasal cavity
      - oropharynx: middle region behind mouth
      - laryngopharynx: inferior region attached to larynx