As we all know, taste is one of the five senses that we humans have. The eyes, nose, tongue, nose, and brain play a part in taste and they make sure that we consume healthy substances instead of rotten foods. The thing that allows us to taste food are called taste cells. There are five types of tastes: sweet, sour, bitter, salty, and umani. Besides taste cells, olfactory cells play an essential part in the sensation of taste. Olfactory cells, which are located in our nose, picks up smells. Taste is a combination of smelling food and tasting it with our mouth.
Link http://www.wisegeek.com/how-does-the-sense-of-taste-work.htm
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