A prepositional phrase is comprised of two parts, a preposition and an object of the preposition. Together, they form the prepositional phrase that is then inserted in a sentence to modify some noun or verb.
The epiglottis is a flap made of elastic cartilage tissue covered with a mucous membrane, attached to the entrance of the larynx. It projects obliquely upwards behind the tongue and the hyoid bone, pointing dorsally. It stands open during breathing, allowing air into the larynx.
Definition and facts about epiglottitis. Patient Comments Share Your Story. Epiglottitis is a potentially fatal medical emergency that occurs when the flap of tissue that covers the trachea (windpipe) during swallowing becomes infected or inflamed, resulting in swelling and obstruction that can close off the windpipe.