Homo sapiens ethmoidal artery posterior ethmoidal artery FMA:49989 posterior ethmoidal vessel Wikipedia:Posterior_ethmoidal_artery UBERON:0012319 arteria ethmoidalis posterior The posterior ethmoidal artery is an artery of the head. It is smaller than the anterior ethmoidal artery, branches off from the ophthalmic artery when it reaches the medial wall of the orbit. SCTID:312161000 a. ethmoidalis posterior