The mouth cavity. (Tonsillar fossa, which is a part of the mesopharynx, visible but not labeled.)
Between the plica triangularis and the surface of the palatine tonsils is a space known as the tonsillar fossa (or tonsillar sinus); in many cases, however, this sinus is obliterated by its walls becoming adherent.
|This anatomy article is a stub. You can help Wikipedia by expanding it.|