The epiglottis is a
A) muscle that moves the esophagus into line with the pharynx during swallowing.
B) muscle that moves the trachea out of line with the pharynx during swallowing.
C) muscle sphincter that closes off the entry to the trachea during swallowing.
D) flap of cartilage that flips down to cover the entry to the trachea during swallowing.
Correct Answer:
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