http://awesci.com/taste-areas-tongue-lie/.                                                                                                                    The taste of tonge have 4 parts biter ,salty,Southampton,sweet.                                                              The tonge help to sensation the food and have inside oral cavity , taste porte, lingual epithelium ,taste receptor cell,nasal cell,connective tissue,afferent nerve. Taste have 50 to 100 taste receptor cell .        Umami: umami it’s the part of the centre of the tongue umami discovered in 1913 Kikunae  Ikeada.        Human tongue parts: epiglottis ,palatine tonsil, lingual tonsil,fungiform papillas,circunvallate,taste Buds,epithellum of tongue,surface of the tongue ,surface of the tongue,taste bud,connective tissue,gustatory cel ,Basal cell ,sensor y nerve fiber.watch the foto that its in the url