TASTE

Taste, also known as Gustation, is the Human Sense which drives our appetite and protects us from ingesting poisons.  We Taste with sensory organs [that detect chemicals] called Taste Buds which are located on our tongue. 

Our Taste Buds are limited to sensing only five distinct Tastes:
Salt,  Sweet,  Sour,  Bitter,  &  Umami. 

It is important to note that we have Taste Buds spread all over our tongues to differentiate the five Tastes, but we perceive these Tastes to have a more localized effect.  For instance, we perceive Sourness on the outer sides of our tongue, Bitterness on the back, Sweetness and Saltiness on the tip, and Umami throughout.