tasting

[klm]

i recently read in "wine savvy" by heidi yorkshire the following: "you may have read in a physiology text or another wine book that the tongue is divided into zones where the taste buds taste only sweet, sour bitter, or salty flavors. that's wrong. in fact, all the taste buds taste all flavors."

this i found confusing since i have always been taught that the buds are indeed divided. do all the buds taste all flavors, but some more prominently in some areas? ms. yorkshire did not elaborate on this information.