Question

We cannot taste on dry tongue why​

Answer 1

Answer:

you need saliva to taste foods. In order for food to have taste, chemicals from the food must first dissolve in saliva. Once dissolved, the chemicals can be detected by receptors on taste buds.

Answer 2

Answer:

There are fine and numerous taste buds on our tongue, which help us to identify the taste.

In order for food to have taste, chemicals from the food must first dissolve in saliva. Only when dissolved, the chemicals can be detected by receptors on taste buds. Hence, our tongue should be wet to detect the taste.