Normal Epiglottis The normal epiglottis is a very thin flap of tissue that closes over the windpipe when swallowing preventing food/liquids from going down the wrong way. Shown by the blue arrow in the picture, when the epiglottis becomes infected, it can swell in size to even obstruct the airway leading to death by asphyxiation. Indeed, epiglottitis is what is thought to have killed our first President George Washington . Fortunately, epiglottitis is quite rare ever since the introduc…