The nervous system includes the brain, spinal cord, and nerves. Structures within the system
may be classified according to divisions: central, peripheral, and autonomic divisions of the nervous system.
- the central nervous system includes the brain and spinal cord
- the sensory (incoming) and motor (outgoing) nerves make up the peripheral nervous system
- the autonomic nervous system has structures that parallel the spinal cord and then share the same pathways as the peripheral nerves. This division is involved with motor impulses (outgoing commands) that travel from the central nervous system to the heart mus
cle, blood vessels, secreting cells of glands, and the smooth muscles of organs. The impulses will stimulate or inhibit certain activities.