The floor of mouth includes the soft tissue which is located between the hyoid and the body of mandible. The thin non-keratinized mucosa presents typical structures like:
- Plica sublingualis: a paired narrow bulge which runs from the Caruncula sublingualis angular in posterior direction.
- Caruncula sublingualis: a small papilla located lateral of the lingual frenulum. It contains the common opening of the excretory ducts of the sublingual und submandibular glands.
- Frenulum linguae: The lingual frenulum is a mucosal fold which connects the floor of mouth to the ventral surface of the tongue and, therefore, limits the movements of the tongue