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Unformatted text preview: •Lines conducting portion of respiratory tract •Protected from contamination by respiratory defense system The Upper Respiratory System The nose and nasal cavity consists of: •External nares •Nasal cavity •Vestibule •Superior, middle and inferior meatuses •Hard and soft palates •Internal nares •Nasal mucosa The pharynx •Shared by the digestive and respiratory systems •Divided into three sections: •Nasopharynx – superior portion •Oropharynx – continuous with the oral cavity •Laryngopharynx – between the hyoid bone and the esophagus The Larynx The larynx •Air passes through the glottis on the way to the lungs •Larynx protects the glottis •Cartilages of the larynx •Three large cartilages •Thyroid, cricoid, and epiglottis •Paired cartilages •Arytenoids, corniculate, and cuneiform...
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