Plexus
In a plexus, nerve fibres from many spinal nerves are sorted and recombined to form a single nerve that contains all of the fibres that travel to a particular body area. There are four nerve plexuses in the body's trunk: The head, neck, and shoulder are all connected to the spinal cord by the cervical plexus.
A particular kind of cell that relays information from the body to the brain and back to the body. A modest electrical current is used to transmit the messages. also known as a neuron.
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