Final answer:
The epiglottis, uvula, and constrictor muscles are the formations that participate in the process of swallowing food.
Step-by-step explanation:
When swallowing food, several formations in the body participate in the process. These include the epiglottis, uvula, and the constrictor muscles. The epiglottis is a flap of cartilage that prevents food from entering the windpipe, or trachea, during swallowing. The uvula is a small structure hanging from the soft palate that helps close off the nasal passage during swallowing. The constrictor muscles in the throat contract to propel the food into the esophagus.
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