Mammalian Nervous System (Cambridge (CIE) O Level Biology): Revision Note

Lára Marie McIvor

Last updated

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

Nervous System Diagram

The human nervous system

The human nervous system

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Lára Marie McIvor

Author: Lára Marie McIvor

Expertise: Biology Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.