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Organization of the nervous System
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The nervous system is enabled by a network of specialized cells called the neurons to transmit signals within the body and also coordinate actions
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Organization of the nervous System
The nervous system is enabled by a network of specialized cells called the neurons to
transmit signals within the body and also coordinate actions. Thus, the nervous system is defined
as network of cells specialized in transmitting signals to different parts of the body and also
coordination of actions. The nervous system has two key parts; the peripheral and the central
nervous system. The peripheral nervous system is made up of the nerves that emanate from the
spinal cord and branch to different parts of the body (Szentágothai and Érdi 367). The central
nervous system entails the spinal cord and the brain. The PNS is further divided into autonomic
and somatic nervous systems. The somatic nervous system facilitates voluntary control of
movement in the skeletal muscles while the autonomic nervous system enables the involuntary
control of the internal organs, cardiac muscles, blood vessels and smooth muscles (Szentágothai
and Érdi 367). The autonomic nervous system is further divided into parasympathetic and
sympathetic. The parasympathetic nervous system facilitates digestion and rest and the
sympathetic nervous system facilitates flight and fight. Some of the body activities that are
enabled by the parasympathetic nervous system are salivation, sexual arousal and rest. On the
other hand, the sympathetic nervous system enables the body to sense and escape danger.
The nervous system has three main functions; motor output, information processing and
sensory input. For instance, the peripheral nervous system responds to the environment and
sends signals to the central nervous system. The CNS processes the information which enables
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