Answer: epiglottis

AnswerCrossword Clue
EPIGLOTTISLarynx protector
EPIGLOTTISPart of the throat.
epiglottisA flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe
epiglottisa cartilaginous flap over the glottis