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1 of 6 © Boardworks Ltd 2009 The human nervous system The nervous system is a highly organized system of nervous tissue that detects, relays and coordinates information about an organism’s internal and external environment. All nervous systems contain nerve cells, called neurons, which convey information in the form of nerve impulses. They can produce a rapid, localized response. 2 of 6 © Boardworks Ltd 2009 How is the nervous system organized? 3 of 6 © Boardworks Ltd 2009 General structure of a neuron 4 of 6 © Boardworks Ltd 2009 Types of neuron There are several different types of neuron: sensory neurons: receptor organs relay neurons: sensory neurons CNS motor neurons motor neurons: CNS 5 of 6 effectors © Boardworks Ltd 2009 Neuron structure 6 of 6 © Boardworks Ltd 2009
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