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Life processes - Control and Coordination

Parts of the nervous system

  • Human nervous system divided into- central nervous system (CNS) and peripheral nervous system (PNS)
  • CNS consists of the brain and spinal cord 
  • PNS consists of the nerves that connects the CNS to different parts of the body
  • The Brain, spinal cord, and nerves are the important parts of the nervous system


  • The brain is enclosed in a bony box called the cranium and spinal cord is protected by vertebral column.
  • The brain and spinal cord are externally covered by protective covering called meninges.
  •  It is made up of three layers namely duramater (outer layer), arachnoid (middle layer), piamater (inner layer).
  •  The space between meninges is filled by a watery fluid called cerebro- spinal fluid (CSF).  

Human brain is classified into- forebrain, midbrain, and hindbrain. 

  • Forebrain- It consists of cerebrum, thalamus, and hypothalamus.
  • It has following functions:
    • It is the thinking part of the brain.
    • The forebrain has sensory regions that receive sensory impulses from various receptors.
    • It has motor regions…

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