Full Body of Tongue Description
[Continued from above] . . . its rough appearance is caused by tiny bumps called papillae, which house the taste buds.
The taste buds contain many nerves that convey sensory impressions of taste to the brain. This makes the tongue the body's primary taste organ. Although the tongue's taste map is very well known, the strict delineation of taste that it shows does not actually exist; every taste bud can sense each of the four common tastes (salty, sour, bitter and sweet) to some degree.