Nervous system - Vertebrate nervous systems

The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and processes input from the senses, and initiates actions. Prominent participants in a nervous system include neurons and nerves which play roles in such coordination. In animals without brains, the nervous system does not generate or conduct thoughts and emotions. Thus it is the system that animates "animals" (sponges are an exception). Chemicals that target the activity of nerves generally are the most rapidly act ...

Including:

• Nervous system - Vertebrate nervous systems
• Nervous system - Metabolism of the nervous system

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The nervous systems of vertebrate animals are often divided into a central nervous system (CNS) and the peripheral nervous system (PNS). The CNS consists of the brain and spinal cord. The PNS consists of all other nerves and neurons that do not lie within the CNS. The large majority of what are commonly called nerves (which are actually axonal processes of nerve cells) are considered to be PNS. The peripheral nervous system is divided into ...

See also:

Nervous system, Nervous system - Vertebrate nervous systems, Nervous system - Metabolism of the nervous system

Read more here: » Nervous system: Encyclopedia II - Nervous system - Vertebrate nervous systems