the two openings of pharynx, one leading to trachea and the other leading to oesophagus , lie very close to each other,yet food we swallow normally does not enter into our trachea. Why?
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It is because of epiglottis
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Answer:
The EPIGLOTTIS is a flexible flap at the superior end of the larynx in the throat. It acts as a switch between the larynx and the esophagus to permit air to enter the airway to the lungs and food to pass into the gastrointestinal tract.
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