#meninx__meninges  a membrane (one of 3) that envelops the brain and spinal cord
  supertype:  tissue_layer__membrane  a pliable sheet of tissue that covers or lines or connects organs or cells of animals
  part:  subarachnoid_space
  subtype:  leptomeninges__leptomeninge  the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers
  subtype:  dura_mater__dura  the outermost (and toughest) of the 3 meninges
  subtype:  arachnoid_membrane__arachnoidmembrane__arachnoid  the middle of the 3 meninges
  subtype:  pia_mater__piamater  the highly vascular innermost of the 3 meninges

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