The front opening of the wind pipe is guarded by
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Epiglottis
TRACHEA (WINDPIPE)
Trachea is long, muscular tube extending from the larynx in the neck to bronchi in the thoracic cavity. The front opening of trachea called glottis is guarded by a muscular flap called epiglottis. The epiglottis closes the trachea at the time of swallowing of food.
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