ABSTRACT
The nervous system coordinates the activities of many organs, and is responsible for modulating and regulating numerous physiological processes via a network of specialized cells. These cells form the brain and spinal cord (central nervous system, CNS), and sensory and motor fibres that enter and leave the CNS or are wholly outside the CNS (peripheral nervous system, PNS). The basic unit of the nervous system is a highly specialized cell for the reception and transmission of information, the neuron.
