The document summarizes the main components and functions of the central and peripheral nervous systems. It discusses the key parts of the brain including the cerebrum, cerebellum, midbrain, pons, and medulla oblongata. It describes the protective meninges and cerebrospinal fluid that surrounds the brain and spinal cord. The peripheral nervous system includes cranial and spinal nerves. The autonomic nervous system controls involuntary functions and has sympathetic and parasympathetic divisions.