Mammalian Nervous System (Cambridge (CIE) IGCSE Biology) : Revision Note

Structure & Role of the Mammalian Nervous System

• The human nervous system consists of the:

  • central nervous system (CNS) - the brain and the spinal cord

  • peripheral nervous system (PNS) - all of the nerves in the body

• It allows us to

  • Make sense of our surroundings and respond to them

  • Coordinate and regulate body functions

• Information is sent through the nervous system as nerve impulses - electrical signals that pass along nerve cells known as neurones

• A bundle of neurones is known as a nerve

The human nervous system