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?
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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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