The central part of the tongue has no taste sensations because that part consists primarily of filiform papillae, which do not contain taste buds.
Filiform papillae are the fine, cone-shaped structures present in the dorsum of the tongue. The granule like sensation of tongue is given due to these. They also are responsible for the sensation of touch. They are keratinized papillae that look white in color.
Taste buds are responsible for recognizing the various taste of food that we eat. They are also called the gustatory cells. They identify 5 types of taste: sweet, sour, salty, bitter and savory. There are four locations of the taste buds: tongue, palate, pharynx, and epiglottis.
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