The document provides an introduction to the nervous system, including: - The nervous system is divided into the central nervous system (CNS; brain and spinal cord) and peripheral nervous system (PNS; spinal nerves and cranial nerves). - The CNS processes and transmits information while the PNS transmits signals between the CNS and body. - Components include the somatic and autonomic nervous systems. The somatic system communicates with skin, bones and muscles while the autonomic governs organs and glands.