The arachnoid mater is
A) the innermost meningeal layer.
B) a delicate, richly vascularized meningeal layer that is "cobwebby" in appearance.
C) a tough, inelastic membrane that covers the central nervous system.
D) involved with the formation of cerebrospinal fluid.
E) more than one of these answers is correct.

Question

Quizplus · Accepted Answer

The arachnoid mater is a delicate, cobweb-like meningeal layer that is richly vascularized and situated between the dura mater and pia mater. It is not the innermost or toughest meningeal layer, nor is it directly involved with cerebrospinal fluid formation, although it does contribute to its circulation.

The Arachnoid Mater Is