What is the primary function of the epiglottis?

The primary function of the epiglottis is to prevent food and liquid from entering the trachea during swallowing. This small flap of cartilage, located at the base of the tongue, acts as a gate that closes off the trachea when swallowing occurs. It ensures that food is directed into the esophagus, which leads to the stomach, rather than into the airway, which would lead to choking or respiratory complications. This protective mechanism is crucial for efficient and safe swallowing, allowing the digestive system to function properly while also safeguarding the respiratory system.

Other options may refer to different components of the respiratory and digestive systems, but they do not accurately describe the specific role of the epiglottis, which is primarily focused on preventing aspiration during the act of swallowing.