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Foramen caecum

The dorsum of the tongue is convex and marked by a median sulcus, which divides it into symmetrical halves;

this sulcus ends behind, about 2. 5 cm from the root of the organ, in a depression, the foramen cecum,

from which a shallow groove, the sulcus terminalis, runs lateral and anterior on either side to the margin of the tongue.

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