Final answer:
The uvula is a small structure located at the apex of the soft palate. Its main function is to prevent ingested materials from entering the nasal cavity during swallowing.
Step-by-step explanation:
The uvula is a small bulbous, teardrop-shaped structure located at the apex of the soft palate. Its function is to help close off the nasopharynx during swallowing, preventing ingested materials from entering the nasal cavity. Additionally, the uvula plays a role in producing the sound of snoring. When you swallow, the soft palate and uvula move upward, keeping foods and liquids from entering the nasal cavity.