A nurse on rounds observes that a client has been eating food rather hastily. Based on this information the nurse knows that what structure of the respiratory system prevents foreign matter from entering the lower respiratory system?
A) Trachea
B) Esophagus
C) Epiglottis
D) Pharynx
C
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The pharynx is divided into three areas: nasopharynx, oropharynx, and laryngopharynx. The epiglottis is a protective flap that covers the trachea during swallowing to prevent foreign matter from entering the respiratory system. The trachea and esophagus are both located in the pharynx.
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