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Martin Kaylee Nervous System Period 1 (Major functions of the nervous…

- - - - -innermost layer
      - -thin, contains blood vessels
      - -attached to surface of brain and spinal cord
      - -nourishes brain cells & protects
    - - middle layer
      - -thin, web-like membrane
      - -lacks blood vessels
      - -between dura and pia
      - *subarachnoid space: between arachnoid and pia, contains cerebrospinal fluid
    - - -outermost layer
      - -made of tough, white, fiborous connective tissue
      - -contains many blood vessels
      - -attaches to inside of cranial cavity
- - - - dural sinuses are
        space between dural layers at specific dural projection junctures. take away cerebral spinal fluid from arachnoid space
- - - - anterior root
        
        posterior root
        
        posterior root ganglion