The arterial circle of the base of the brain and its feeding vessels in certain mammals.
D000818:Animals; D001921:Brain / Q000098:blood supply*; D002339:Carotid Arteries / Q000033:anatomy & histology; D002941:Circle of Willis / Q000033:anatomy & histology*; D004285:Dogs / Q000033:anatomy & histology; D006801:Humans; D008322:Mammals / Q000033:anatomy & histology*; D011817:Rabbits / Q000033:anatomy & histology; D012756:Sheep / Q000033:anatomy & histology; D013552:Swine / Q000033:anatomy & histology