part_of part of part of in lateral side of branching part of branching part of internal carotid artery posterior communicating artery http://upload.wikimedia.org/wikipedia/commons/2/2e/Circle_of_Willis_en.svg UMLS:C0149559 EHDAA:3352 TAO:0005001 PCA EHDAA2:0004518 FMA:50084 arteria cerebri communicans posterior uberon todo - verify ZFA link: An artery that connects caudal division of the internal carotid artery and the basal communicating artery to the basilar artery Wikipedia:Posterior_communicating_artery SCTID:181314001 PCS NCIT:C33357 ZFA:0005001 RETIRED_EHDAA2:0001487 One of a pair of right-sided and left-sided blood vessels in the circle of Willis. It connects the three cerebral arteries of the same side. Anteriorly, it is one portion of the terminal trifurcation of the internal carotid artery. The anterior cerebral artery and the middle cerebral artery are the other two branches of the trifurcation. Posteriorly, it communicates with the posterior cerebral artery. posterior communicating segment of the basilar artery UBERON:0001628 MA:0002023 EMAPA:18600 An artery that connects caudal division of the internal carotid artery and the basal communicating artery to the basilar artery. Isogai et al. 2001.[TAO] OpenCyc:Mx4rwDDlqpwpEbGdrcN5Y29ycA caudal communicating segment head blood vessel circle of Willis systemic artery communicating artery lateral structure