Color enhanced scanning electron micrograph (SEM) of the surface of the human tongue. The pattern of tiny surface projections (papillae) is seen here. Filiform papillae, also known as conical papillae, have mechanical and tactile (touch) functions. These papillae also form a rough surface which helps in the chewing and manipulation of food. Fungiform papillae are less numerous and are well supplied with blood; they contain taste buds under their surface, thus playing a sensory role. Magnification: 180x.