esophagus....
Yes epiglottis act as a shield or better to say a door with onesided movement.when we eat something the door(epiglottis) closes the entrance to windpipe or larynx and after the food passes to the food pipe or pharynx it again opens up and allow breathing.
When you swallow, the larynx moves up slightly, and a flap called the epiglottis closes over the trachea.
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windpipe; tube through which air moves.
Trachea
The epiglottis moves downards to block the trachea during swallowing.
The air moves from the outside into the lungs through the windpipe.
there is still air in the trachea. when you push down on the trachea, the air moves from the trachea and into the lungs, thus inflating it. the lings should appear to move up. be a truth seeker
Trachea
shijuhew
breathing.
Air moves from the sinuses into the trachea, the esophagus is part of the digestive tract.