Oral cavity: opening or hollow
part of the mouth.
Frenulum of lip: cutaneous fold of the lips.
Tonsil (pharyngeal): lymphoid organ in the throat.
Palatopharyngeal arch: rear membrane holding the tonsil in place.
Palatoglossal arch: front membrane holding the tonsil in place.
Uvula: fleshy appendage that closes the nasal fossae during swallowing.