Arachnoid mater:

a close-up view of the meninges.

a close-up view of the meninges.

one of the layers in the meninges, the arachnoid mater has the consistency of a spider web and lies between the dura mater and pia mater.

Read more: Know your brain - Meninges

Watch this 2-Minute Neuroscience video to learn more about the meninges.