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mikael mikael
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Posts: 12017
10 years ago
Once food is swallowed, what is the tiny flap of tissue that keeps food from entering the trachea called?
A) pyloric valve
B) esophagus
C) epiglottis
D) upper esophageal sphincter
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Doctor-2-BDoctor-2-B
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10 years ago
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mikael Author
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