Question

what prevents entry of food particle into the windpipe?
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Answer 1

A small organ epiglottis do this.

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Answer 2

Epiglottis prevent the entry of food into the glottis by opening the wind pipe during swallowing or by closing it

• Epiglottis is a tissue which acts as a valve that diverts air to lungs and food to intestine. While the function of glottis is to make several voicing sounds by adjusting the size of the glottal opening.
• Epiglottis prevents food or liquids from entering the trachea (windpipe).
• It maintains the upward position while we breath. When we swallow the food, it folds down and closes the trachea. Thus food is directed into esophagus
• Glottis is an opening between the folds of vocal chord. When trachea is closed, passage to the vocal chord is closed. Individual closing of glottis does not take place while swallowing