4. In the throat, air and food share a common passage. How is the food then prevented from entering the windpipe?
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The epiglottis , a small flap of tissue, covers the air-only passage when we swallow, keeping food and liquid from going into the lungs.
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The epiglottis is a region of the larynx that is important during the swallowing of food or drink. As a person swallows, the pharynx moves upward and the epiglottis closes over the trachea, preventing food or drink from entering the trachea.
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