Mechanism of taste buds

Figure (A) The tongue consists of small structures known as papillae (raised bumps) where taste buds reside. Depending on their shape papillae are classified into four groups: circumvallate, fungiform, foliate and filiform (B) Each taste bud harbors a set of elongated taste receptor cells that contain taste receptors that sense substances with different taste qualities. Upon detecting a substance, taste receptor cells transmit the information to gustatory nerves in contact with the tissue, which further transmit the information to the central nervous system, ultimately reaching the brain.