The tongue is a muscular organ that is located in the mouth covered with mucosa, which is a moist pink tissue. The tongue is used for tasting and is also vital for swallowing and chewing food in addition to communicating vocally.
There are four major tastes in the tongue including sour, bitter, sweet and salty which make up the four major regions of the tongue. Additionally, a fifth taste, unami is caused from tasting foots with glutamate. Once the tongue tastes a food, it sends signals directly to the brain to interpret and make sense of what the food is and its taste. Tongues include taste buds which help to collect information from food in the mouth to transport the data to the brain through nerve-like cells.