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Taste buds (or lingual papillae) are small structures on the upper surface
of the tongue that provide information about the taste of food being eaten.
There are four types of taste buds present in the human tongue.
* Fungiform papillae - as the name suggests, these taste buds are
slightly mushroom shaped if looked at in section. These are present
mostly at the apex (tip) of the tongue.
* Filiform papillae - these are thin, longer taste buds, and are the most
* Foliate papillae - these are ridges and grooves towards the posterior
part of the tongue.
* Vallate papillae - there are only about 3-14 of these taste buds on
most people, and they are present at the back of the oral part of the
tongue. They are arranged in a V-shaped row just in front of the sulcus
terminalis of the tongue.