part of part of tetrapod frontal bone foramen cecum of frontal bone http://upload.wikimedia.org/wikipedia/commons/9/91/Gray135.png foramen caecum ossis frontalis UBERON:0006713 f. caecum ossis frontalis Wikipedia:Foramen_cecum_(frontal_bone) TODO - check if this is what the FMA ID really denotes The frontal crest of the frontal bone ends below in a small notch which is converted into a foramen, the foramen cecum, by articulation with the ethmoid. This foramen varies in size in different subjects, and is frequently impervious; when open, it transmits a vein from the nose to the superior sagittal sinus. This has clinical importance in that infections of the nose and nearby areas can be transmitted to the meninges and brain from what is known as the danger triangle of the face. FMA:57443 foramen of skull