How many areas of taste has the tongue?
There is no such thing as “areas” of taste in the tongue. The taste buds are all spread out on the tongue and each taste bud has taste cells only responding to one class of dissolved chemical stimulus. Yes, we still taste the traditional 4 flavors (bitter, sweet, sour, salty) however, there are many more flavors such as umami (savory), dryness, etc…