Tongue (lower surface): fleshy, mobile organ situated in the mouth of humans, used to taste, swallow and speak.
Superior dental arch: set of teeth of the upper jaw.
Sublingual fringe: fringe beneath the tongue.
Lingual vein: vein of the tongue.
Sublingual protuberance: a projection under the teeth.
Openings of the ducts of the submandibular and sublingual salivary glands: papillae situated beneath the tongue.
Lower lip: lower external part of the mouth, covering the tongue.
Frenulum of the tongue: membrane that prevents a person from swallowing his or her tongue.
Upper lip: upper external part of the mouth, coverint the teeth.