Taste is actually a chemical sense which is perceived by the receptor cells of the taste buds present on tongue.
Our tongue actually is divided into four different types of papillae which are also called bumps. In each papilla, 50-250 taste buds exist and these taste buds consist of 15 to 20 taste receptor cells which link with nerve fibres to communicate the taste impulse to brain. A few taste buds are also present in throat and on the soft palate at the back of mouth.
Our tongue can detect four types of basic tastes, that is sweet, sour, bitter and savory. When we intake food, its chemical components get their way to taste buds and in this way we feel that taste. As much we grow older, we loss our capacity to taste food because taste receptors which usually get renewed after 7 days, start deceasing slowly.
