2.83 Central Nervous System

- The central nervous system (CNS) is the part of the nervous system that integrates the information that it receives from, and coordinates the activity of, all parts of the bodies.
- This excludes:sponges and radially symmetric animals such as jellyfish.
- It contains the majority of the nervous system and consists of the brain and the spinal cord.
- Together with the peripheral nervous system, it has a fundamental role in the control of behavior.
- The CNS is contained within the dorsal cavity, with the brain in the cranial cavity and the spinal cord in the spinal cavity.