Filiform papilla

Filiform papillae are one of the four types of papillae found on the human tongue. They are small, conical or thread-like structures, and are the most numerous of the papillae types. Filiform papillae are responsible for giving the tongue its rough texture and are involved in the mechanical handling of food.

Anatomy

Filiform papillae are located on the anterior two-thirds of the tongue, covering the majority of the tongue's dorsal surface. They are smaller and more numerous than the other types of papillae (fungiform papillae, foliate papillae, and circumvallate papillae). Unlike the other types of papillae, filiform papillae do not contain taste buds. They are covered with keratin, which gives them a whitish or light pink color.

Function

The primary function of filiform papillae is to provide grip and aid in the manipulation of food within the mouth. The keratinized surface of the filiform papillae provides a rough texture that helps in the mechanical breakdown of food. They also play a role in the sensation of touch and temperature within the mouth.

Clinical significance

Changes in the appearance or number of filiform papillae can be indicative of certain medical conditions. For example, in a condition known as geographic tongue, patches of filiform papillae are lost, giving the tongue a map-like appearance. In black hairy tongue, an overgrowth and darkening of the filiform papillae occurs, giving the tongue a black and hairy appearance.

See also

• Taste bud
• Tongue
• Papillae