Central Nervous System Components
Brain - directs regulation and function of the nervous system and other systems of the body.
Spinal Cord - initiates reflex activity and transmits impulses to and from the brain.
Cranium And Vertebral Column - Brain and spinal cord are encased, respectively, in cranium and vertebral column.
Vertebrae - 7 cervical, 12 thoracic, 5 lumbar, 5 fused sacral, fused coccygeal.