Posterior ethmoidal foramen

Lateral to either olfactory groove are the internal openings of the anterior and posterior ethmoidal foramina (or canals).

Posterior ethmoidal foramen
Base of the skull. Upper surface. (On the left, "Posterior ethmoidal foramen" is the 9thlabel from the right.
Latinforamen ethmoidale posterius
Anatomical terms of bone

The posterior ethmoidal foramen opens at the back part of this margin under cover of the projecting lamina of the sphenoid, and transmits the posterior ethmoidal vessels and nerve.

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