Which is the middle spiderweb-like layer?

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Explore the Hemispheres 3.0 Level I Brain Anatomy and Physiology Test. Study with detailed questions, answers, and hints. Enhance your knowledge and boost your preparation for success!

Multiple Choice

Which is the middle spiderweb-like layer?

Explanation:
The middle protective layer with a spiderweb-like appearance is the arachnoid mater. It sits between the tough outer dura mater and the delicate inner pia mater, forming a web-like network of trabeculae that creates the subarachnoid space where CSF flows and major vessels run. This spider-web look is the hallmark that distinguishes it from the other layers. The dura mater is the thick outer layer, and the pia mater clings directly to the brain’s surface. Grey matter, by contrast, is a tissue region within the brain, not a meningeal layer.

The middle protective layer with a spiderweb-like appearance is the arachnoid mater. It sits between the tough outer dura mater and the delicate inner pia mater, forming a web-like network of trabeculae that creates the subarachnoid space where CSF flows and major vessels run. This spider-web look is the hallmark that distinguishes it from the other layers. The dura mater is the thick outer layer, and the pia mater clings directly to the brain’s surface. Grey matter, by contrast, is a tissue region within the brain, not a meningeal layer.

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