Areas on the tongue covered primarily with filiform papillae, which contain no taste buds, are similar to Blind spot in vision.
Dorsal surface of the anterior tongue region is covered with many irregularities and mucosal bumps, known as tongue papillae, all the way to the sulcus terminalis. There are four different forms of papillae: foliated, circumvallate, fungiform, and filiform.
The fungiform, foliated, and circumvallate papillae contain taste buds, which are visible as oval structures that appear pale in histology sections, but not the filiform. Filiform papillae, however, lack taste receptors. Instead, they serve as grips or ripples on your tongue that make it easier to chew, speak, and clean your mouth.
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