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Jessica Zaragoza

Respiratory Tract Structures

StructureFunction
Upper Respiratory Tract Processing of incoming air Conducts air to and from lungs Vocalization and phonation Olfaction
Nasal cavity Conducts air between atmosphere (external environment) and pharynx Warms, humidifies, cleans inspired air
Anterior nares (external nares) Boundary between external environment and nasal cavity
Vestibule Conducts air between external environment and respiratory portion of nasal cavity Vibrissae prevent entry of large contaminants. Conducts air between pharynx and vestibular folds
Respiratory portion Conducts air between vestibule and pharynx Meatuses create turbulence to assist processing of inspired air Mucosa warms, humidifies, and cleans inspired air Olfaction
Paranasal sinuses Reduce weight of skull Help warm and humidify air
Posterior nares (internal nares) Boundary between nasal cavity and pharynx
Pharynx Conducts air between nasal cavity and larynx
Nasopharynx Conducts air between posterior nares and oropharynx
Oropharynx Conducts air between nasopharynx and/or oral cavity and laryngopharynx
Laryngopharynx Conducts air between oropharynx and larynx
Tonsils Immune protection of respiratory and digestive mucosa
Larynx Conducts air between the pharynx and trachea Prevents food from entering lower airways Vocalization Ciliary escalator removes contaminants
Epiglottis Flexes during swallowing to cover larynx and prevent food from entering lower airways
Vestibular folds (false vocal folds) Slow contaminants dripping toward lower airways
Ventricle (laryngeal ventricle) Conducts air between mucosal folds of larynx
Vocal folds (true vocal folds or vocal cords) Prevent contaminants from entering lower airways Produce vibrations when pulled together during expiration (vocalization)
Infraglottic cavity Conducts air between vocal folds and trachea
Created by: Yeska415
 

 



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