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nervous system
Member rating: No Rating | Words: 982 | Submitted: Thu Feb 14 2008
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The brain and the body are constantly alive with billions of chemical and electrical signals. The nervous system has two main divisions. The central nervous system (CNS) is made up of the brain and spinal cord. Nerve fibres that branch from the CNS are referred to as the peripheral nervous system (PNS). The PNS is constantly sending information to the CNS that processes the information and then send messages back to the PNS. Diagram 1 - Systems of Nervous System Communication and Co-ordination The main job of the nervous system is to control the communication and co-ordination within the body; however the Hormonal or Endocrine system as it is sometimes referred as is also involved with the communication and co-ordination of the body. Nerves Hormones Sends fast messages around the body Sends slow messages around the body Acts for a very short time Acts for a long time Acts in a precise area Acts...
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