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Nervous System

Evolution Of Invertebrate Nervous Systems, Evolution Of The Vertebrate Nervous System, Central Nervous System, Peripheral Nervous System

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.

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Science EncyclopediaScience & Philosophy: Mysticism to Nicotinamide adenine dinucleotide