Medico Plasma on Instagram: "The dorsal surface of the tongue is covered by stratified squamous epithelium and specialized by lingual papillae: filiform, fungiform, foliate, and circumvallate. Filiform papillae are keratinized and provide friction; they lack taste buds. Fungiform papillae are scattered across the dorsum and contain taste buds. Foliate papillae lie on the posterolateral margins and are rich in taste buds. Circumvallate papillae form a V-shaped row anterior to the sulcus terminali