Divisions of nervous system

• Nervous system is a network of nerve cells that transmit messages between different parts of the body
• Central nervous system - 


  -Consists of brain and spinal cord

  -These transfer messages to and from the environment
• Peripheral nervous system - 


  -Sends and receives information from and to the central nervous system
• CNS The brain-

  -Centre of all conscious awareness

  -Divided into different lobes with different functions
• CNS Spinal cord- 


  -Extension of the brain

  -Responsible for reflex actions such as pulling your hand away from a hot plate
• PNS Somatic nervous system- 


  -Carries sensory info from sensory organs to the CNS and relays motor commands to muscles ; controls voluntary movement
• PNS automatic nervous system- 


  -Regulates involuntary bodily processes, including heart rate and respiration

  -Sympathetic nervous system , fight or flight

  -Parasympathetic nervous system, returns body to relaxed state