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Describe the structure of the central nervous system.

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  • The central nervous system consists of the brain and spinal card. 
  • The organization of the brain is extremely delicate and highly evolved. 
  • The brain is the main controlling part of the nervous system and is safely located in the cranial cavity. The spinal cord is protected by the vertebral column.
  • In the space between the delicate central nervous system and its bony covering are the protective layers called the meninges. 
  • Cavities present in various parts of the brain are called ventricles whereas the long tubular cavity of the spinal cord is called the central canal. 
  • The ventricles, central canal and spaces between the meninges are filled with cerebrospinal fluid.
  • This fluid supplies nutrients to the central nervous system and protects it from shock.

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