0 a small flat part at the back of the tongue that closes when you swallow to prevent food from entering the tube that goes to the lungs -- （舌头后部的）会厌
In a normal epiglottal stop, the epiglottis need not close against the pharyngeal wall.
The apex of the epiglottis can still be seen (behind an air bubble).
Moreover, the aryepiglottic folds are stretched between the lowered arytenoids and the epiglottis, as a result of tongue advancement.
A gum elastic bougie is invaluable when only the posterior portion of the glottis or the tip of the epiglottis is visible.
When we swallow food or drink, a lid called the epiglottis usually comes down over the trachea to prevent food from falling in and blocking the windpipe.
In (a) the long vowel is nearing its end and the lateral margins of the epiglottis are far from the pharyngeal walls indicated by the lines.
It is found in the epiglottis (part of the larynx) and the pinnae (the external ear flaps of many mammals including humans).
Subsequently, false vocal fold adduction, adduction of the aryepiglottic folds and retroversion of the epiglottis take place.
