What is the uvula?

The uvula is defined as a small structure that hangs from the soft palate at the back of the throat. It plays several important roles, including aiding in speech by helping to articulate sounds and playing a role in preventing food from entering the nasal cavity during swallowing. The uvula also contributes to the gag reflex, part of the body's defenses against choking.

In contrast, the other options do not accurately describe the uvula. A gland in the throat refers to salivary or other glands that are involved in secretion processes, which are different anatomical structures. A type of dental structure suggests a part of the teeth or gums, which is unrelated to the uvula’s function. Lastly, a muscle in the tongue refers to the intrinsic and extrinsic muscles that allow for movement and manipulation of the tongue, which is a separate organ from the uvula. Thus, the choice that identifies the uvula as a small structure hanging from the soft palate is the most accurate description.