Biology: Tongue

The tongue is a cluster of mussels located at the bottom of the mouth. It has a number of uses in speaking, chew, and swallowing. The average length of the tongue from the oropharynx to the tip is 10 cm (4 in)

The front part of the tongue is very flexible and can move around a lot, working with the teeth to create different types of words. This part also helps you eat by helping to move food around your mouth while you chew. The muscles in the back of your tongue help you make certain sounds, like the letters "k" and hard "g''. The back of your tongue is important for eating and swallowing as well.

Taste buds allow your tongue to detect thing like different acids (sour), bitternes, sugars (sweet), sodium ions (salty) or glutamate (unami). These taste buds along with your nose send nerve impulses to the brain tellin about the food you are eating and the brain says weithe its safe to eat. Your nose helps you taste foods by smelling them before they go in your mouth and as you chew and swallow them. The tonge is always at work. Even when you are sleeping, your tongue is busy pushing saliva into the throat to be swallowed.

Sources:
Wikipedia
kidshealth.org