Frontal Bone Markings
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Glabella
A single bony prominence of the frontal bone located between the superciliary arches in the inferior part of the frontal bone above the root of the nose.
frontal sinus
cavity within the frontal bone
supra-orbital foramen
for blood vessels of eyebrows, eyelids, and frontal sinuses
squamous part of frontal bone
forms the forehead
Supercillary arch
frontal; projection caused by frontal sinuses at the horizontal ridge