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The two openings o f the 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?


The presence  of  epiglottis  prevents  the  food  from  entering  the  trachea

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There is a flap-like epiglottis attached at the entrance of larynx. It has a leaf like shape.  It normally points upwards wen we breath. When we swallow food, epiglottis folds down to a horizontal position, so preventing food going to trachea. food is directed to esophagus.
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