image by: nealclinic
The nervous system is a complex collection of nerves and specialized
cells known as neurons that transmit signals between different parts of
the body. It is essentially the body’s electrical wiring.
Structurally, the nervous system has two components: the central
nervous system and the peripheral nervous system. According to the National Institutes of Health,
the central nervous system is made up of the brain, spinal cord and
nerves. The peripheral nervous system consists of sensory neurons,
ganglia (clusters of neurons) and nerves that connect to one another and
to the central nervous system.
Functionally, the nervous system has two main subdivisions: the
somatic, or voluntary, component; and the autonomic, or involuntary,
component. The autonomic nervous system regulates certain body
processes, such as blood pressure and the rate of breathing, that work
without conscious effort, according to Merck Manuals. The somatic system consists of nerves that connect the brain and spinal cord with muscles and sensory receptors in the skin.(www.lifescience.com).
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