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  • 1. Meninges and Cerebrospinal Fluid BY: Marianne Johnston
  • 2. What are 3 types of Meninges and what are they?
    • Dura Mater
    • Arachnoid Mater
    • Pia Mater
  • 3. Dura Mater:
    • A thick durable membrane that is closest to the skull.
    • A sac which envelops the arachnoid and has been modified to serve several functions.
    • Surrounds and supports the large various channels carrying blood toward the heart.
  • 4. Arachnoid Mater
    • Name from its spider web like appearance.
    • Exists as a thin, transparent membrane.
    • Does not follow the convolutions of the surface of the brain and is a loosely fitting sac.
  • 5. Pia Mater
    • The Meningeal envelope which firmly adheres to the surface of the brain and spinal cord.
    • It is a very thin membrane composed of a fibrous tissue covered on its outer surface by a sheet of fat cells thought to be impermeable to fluid.
  • 6. What is Cerebrospinal Fluid Made Of?
    • It is ma de of 15 to 45 mg protein ( wh ich is lo wer in children) and 50/80 mg gluc ose (two thirds of blood gluc ose ).
  • 7. What is the Function of Cerebrospinal Fluid?
    • It helps nourish, support, and remove metabolic wastes.
    • It mainly cushions the brain to make knocks to the head have less of an effect.
  • 8. What is Meningitis?
    • It is an infectious disease characterized by inflammation of the meninges usually due to a bacterial or viral infection.