human tongue surface (mucosa with papillae) - closeup view 3d

circumvallate bitterness swallowing fungiform gustation receptors tasteless undefined papillae filiform appetite icecream sourness tasteful anterior sensory covid19 mucosa tongue organs flavor folate bitter cavity grains palate sugary taste savor salty mouth areas cells covid drink gusto herbs human lemon sense smack sweet umami buds salt acid area meat sour zone map