Tongue - Functions of the tongue • 3 primary...

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Unformatted text preview: Functions of the tongue • 3 primary “biological” functions – taste – mastication (chewing) • moves food into position to be crushed by teeth • helps mix food with saliva – deglutition (swallowing) • sweeps mouth clean before forming food into bolus • pushes bolus into pharynx Framework of the tongue • 2 anatomical divisions – blade – root • 4 regions based on relationship to oral cavity – tip – blade – dorsum – root Surface tongue anatomy • longitudinal median sulcus: from front to foramen cecum (pit) • sulcus terminalis: V‐shaped groove, separates anterior 2/3 from poster 1/3 • surfaces – palatine surface • anterior to sulcus terminalis • characterized by projections ‐ papillae – pharyngeal surface (posterior 1/3) • smoother • contains mucous glands and lymph glands (lingual tonsils) • lingual frenulum (frenum) Deep structures of the tongue • Skeleton of the tongue – provides attachments for lingual musculature – corium: fibrous midline septum that divides tongue into 2 halves – lamina propria: deep connective tissue of lingual mucosa ...
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