title: Systems of life. The nervous system. 4.
authors.forename: A
authors.initials: A
authors.lastname: Roberts
mesh_terms: D001921:Brain / Q000033:anatomy & histology* / Q000502:physiology; D002536:Cerebral Arteries / Q000033:anatomy & histology* / Q000502:physiology; D002550:Cerebral Veins / Q000033:anatomy & histology* / Q000502:physiology; D002560:Cerebrovascular Circulation; D006801:Humans; D009131:Muscle, Smooth, Vascular / Q000033:anatomy & histology / Q000502:physiology; D013116:Spinal Cord / Q000033:anatomy & histology* / Q000098:blood supply / Q000502:physiology