The nervous system coordinates behavior and helps to maintain the internal stability of animals. It may be as simple as the nerve net of Cnidarians or as complex as the centralized system of mammals. In all nervous systems the functional unit is the nerve cell or neuron, a cell specialized to transmit and receive a stimulus (Gale 2008).
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The brain and the spinal cord are the two major components of the central nervous system, which is considered the command center of the body (Gale 2010).
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Illustration shows the concept of nanobots enabling adequate function and communication between neurons in the nervous system. These neurons communicate through the use of electrical impulses given off by the brain and carried throughout the body (2012).
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