Arachnoid mater
Arachnoid Mater
The Arachnoid Mater (pronounced: /əˈrakˌnoid ˈmādər/) is one of the three meninges, the protective membranes that cover the brain and spinal cord. The name is derived from the Greek words "arachne" meaning spider, and "eidos" meaning like, due to its spider web-like appearance.
Structure
The Arachnoid Mater is situated between the other two meninges, the Pia Mater and the Dura Mater. It is separated from the Pia Mater by the subarachnoid space, which is filled with cerebrospinal fluid. The Arachnoid Mater itself is a thin, transparent membrane.
Function
The primary function of the Arachnoid Mater is to protect the central nervous system, which includes the brain and the spinal cord. It does this by providing a cushioning effect for the central nervous system, and by serving as a barrier against bacteria and other potentially harmful substances.
Related Terms
- Meninges: The three membranes that cover the brain and spinal cord, namely the Dura Mater, Arachnoid Mater, and Pia Mater.
- Subarachnoid Space: The space between the Arachnoid Mater and the Pia Mater, filled with cerebrospinal fluid.
- Cerebrospinal Fluid: The fluid found in the brain and spinal cord, providing a cushioning effect and serving as a nutrient delivery and waste removal system.
- Central Nervous System: The part of the nervous system consisting of the brain and spinal cord.
See Also
External links
- Medical encyclopedia article on Arachnoid mater
- Wikipedia's article - Arachnoid mater
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