Taste
Taste is a very useful sense that we use up to at least 3 times a day and is one of the least known about senses. Taste is one of the 5 senses. All those bumps on your tongue are called papillae almost all of them containing taste buds. Taste buds have very sensitive microscopic hairs that are called microvilli. The tiny hairs send messages to the brain about how something tastes so you can tell if its sweet, sour, bitter, or salty. 

Taste buds
The average person has about 10,000 taste buds that get replaced every couple of weeks. As a person gets older some of the taste buds do not get replaced. An older person may only have 5,000 working taste buds and that's why certain food might taste stronger to children than it does to adults. Smoking can also reduce the number of taste buds a person has. Your taste buds send messages to the brain of how the food tastes. When you're chewing the food releases chemicals that then alert the olfactory receptors located at the inside the top of your nose. Then the olfactory receptors and your taste buds work together to tell your what your food tastes like.
 How does your nose help?
 Taste isn't just controlled by your tongue your nose also has something to do with it. In the most upper part of your nose are olfactory receptors that have cells that help you smell that then send messages to the brain. Saliva helps with taste if you had no saliva in your mouth the food would not dissolve and you wouldn't be able to taste anything. Interesting Facts The four main tastes that humans have are sweet, sour, bitter and salty. Taste buds are also a sensory organ. Taste buds are also on the roof or your mouth and down your throat. When you burn your tongue your taste buds actually grow back. The difference between taste and flavour is that taste is what your taste buds pickup which are sweet, sour, bitter and salty while flavour is taste and smell combined. Taste is a really useful sense. Without it we wouldn't be able to taste any yummy food and it would all be like a mushy mixture in your mouth.