| NOUN | body | leptomeninges | the two innermost layers of the meninges |
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| Meaning | The two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers. | |
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| Parts | arachnoid, arachnoid membrane | The middle of the 3 meninges |
| pia mater | The highly vascular innermost of the 3 meninges | |
| Broader | meninx, meninges | A membrane (one of 3) that envelops the brain and spinal cord |
| Spanish | leptomeninge | |
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