Nervous System
Nervous System: The functions of the nervous system are sensory input, integration, control of muscles and glands, and mental activity. The nervous system maybe seperated into the central nervous system (CNS) and peripheral nervous system.
The central nervous system (CNS) includes the brain and spinal cord and can be thought of as the "thinking", organizing, or regulating center.
The peripheral nervous system (PNS) includes the nerve cells and axons of the afferent (toward) nerves that communicate information from sensory receptors to the central nervous system, and efferent (away from) nerves that communicate information from the central nervous system to organs, muscles, glands, etc.