Sense of taste (tongue)

When we eat or drink, we can feel the food or drink it. This is because humans have a sense of taste is the tongue. Here is an explanation of the sense of taste.
Rough surface of the tongue as full a pimple. In the scab that there are nerve endings taster. Food and beverages in our mouths, will stimulate the nerve endings and excitatory taster was transmitted to the brain. Therefore, we can taste or taste of food or drink.

In addition to taste, the tongue is useful to set the food in the mouth saliva mixed with chewed as well as possible. The tongue is also useful to give the words. The parts of the tongue are sensitive to a particular flavor is as follows:
1) The tip of the tongue is sensitive to sweet taste
2) The base of the tongue sensitive to bitter taste
3) The edges of the tongue sensitive to sour taste
4) The end of the tongue until slightly to the side sensitive to the saltiness.