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Function: Nervous System Organization

The nervous system is divided into two parts: the central nervous system (CNS), which regulates bodily activity; and the peripheral nervous system (PNS), which transmits signals between the body and the CNS. The PNS is divided into nerves that control voluntary actions or transmit sensations, and nerves that regulate internal functions.

Nerve links between brain and body

Nerve fibres leave the brain and enter the spinal cord to form a thick bundle of nerves. Individual nerves then emerge from the spinal cord and branch out through the body, supplying every tissue.

From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.

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