Verticalis muscle
Encyclopedia
The Verticalis linguæ is found only at the borders of the forepart of the tongue
Tongue
The tongue is a muscular hydrostat on the floors of the mouths of most vertebrates which manipulates food for mastication. It is the primary organ of taste , as much of the upper surface of the tongue is covered in papillae and taste buds. It is sensitive and kept moist by saliva, and is richly...

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Its fibers extend from the upper to the under surface of the organ.
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