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Renin Angiotensin Mechanism.

Meninges the coverings of the brain.

 

Meninges:

  • Brain is protected by cranium and meninges.

  • Brain has special coverings called “meninges”.

  • Meninges covers Brain and spinal cord.

  • Three covers:

    • Dura Mater (Outermost)

    • Arachnoid Mater, (Middle)

    • Pia Mater. (Inner)

  • Spaces between meninges

    • Subdural Space: Between Dura and Arachnoid Mater.

    • Subarachnoid Space: Between Arachnoid mater and Pia Mater.

  • Outermost Layer is “Dura Mater”

  • Lies inside the skull.

  • Forms compartments or folds.

  • Two imp. Folds of Dura mater:

    • Falx: Divides brain laterally.

    • Tentorium: Divides brain horizontally.

  • Arachnoid Mater covers the entire brain.

  • Pia Mater is the innermost layer, containing numerous blood vessels. 

  • Cerebrospinal fluid is present in subarachnoid space.

  • Main function of meninges is “Protection”.

Commonly Asked Question.

  1. Write a short note on the meanings of the brain.
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