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Meninge

Straturile meningelui (sunt reprezentate și osul și epiderma)

Meningele este învelișul encefalului și a măduvei spinării format din trei membrane conjunctive:

  • dura mater constituită din țesut conjunctiv dens, slab vascularizat; aderă la formațiunile osoase ce protejează organele nervoase (craniu și coloană vertebrală);
  • arahnoida este un țesut conjunctiv, avascularizat, aderent la duramater. Între ea și pia mater există lichid cefalorahidian (LCR);
  • pia mater este un țesut conjunctiv care are in continut vase arteriale, aderă la organele nervoase. Are vascularizație nutritivă.

Lichidul cefalorahidian (LCR) are rol de hrănire, de protecție a țesutului nervos împotriva traumatismelor și de transport al unor hormoni. El constituie o barieră în calea pătrunderii în țesutul nervos a unor substanțe dăunătoare din sângele circulant.

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Meninge
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