Page 508 - Atlas of Histology with Functional Correlations

smooth and nonkeratinized.

There are four types of papillae on the dorsal surface of the tongue: filiform,

fungiform, circumvallate, and foliate (not shown).

FIGURE 13.3 ■ Dorsal surface of the tongue, showing the location of different
papillae and tonsils.

Filiform Papillae

The most numerous and smallest papillae on the surface of the tongue are the
narrow, conical, or pointed, filiform papillae. They cover the entire anterior

dorsal surface of the tongue and are keratinized. Filiform papillae of the tongue
do not contain taste buds.

Fungiform Papillae

The less numerous but larger, broader, and taller than the filiform papillae are
the fungiform papillae. These papillae exhibit a mushroom-like shape, project
above the filiform papillae, and are prevalent in the anterior region and tip of the
tongue. Fungiform papillae are scattered among the filiform papillae of the

tongue surface.

Circumvallate Papillae

Circumvallate papillae are larger than the fungiform or filiform papillae. About

8 to 12 circumvallate papillae are located in the posterior region of the tongue in

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