4. Taste
The tongue is the main organ of taste. This is because tiny bumps called taste buds cover the longue. These taste buds contain many taste receptors. When we lick something. or pop a morsel of food into our mouths, the receptors send a message to the brain that tell us exactly what we are eating, and if it's tasty. However, we can only taste four different tastes: sweet, salty, sour, and bitter.