In the process of swallowing, food cannot normally enter the trachea because the ________.
A. tongue directs the flow of food down the esophagus and away from the trachea
B. epiglottis covers the larynx
C. esophageal sphincter shuts off the passage to the larynx
D. trachea does not connect to the esophagus
Answer: B
Nutritional Science
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