Among the layers covering the brain, which one is described as tough and fibrous?

Among the layers covering the brain, which one is described as tough and fibrous?

• A. Pia mater
• B. Arachnoid mater
• C. Dura mater
• D. Subarachnoid space

Answer: (C)

The outermost protective envelope around the brain is the dura mater, and it’s the toughest, most fibrous layer. Its dense collagen fibers form a sturdy barrier that gives mechanical support and helps anchor the brain to the skull. The other layers are softer in comparison: the arachnoid mater is a loose, web-like middle layer, and the pia mater is a very thin membrane that clings tightly to the brain’s surface. The space beneath the arachnoid, the subarachnoid space, contains cerebrospinal fluid and blood vessels. So when something is described as tough and fibrous, the dura mater is the one.

The outermost protective envelope around the brain is the dura mater, and it’s the toughest, most fibrous layer. Its dense collagen fibers form a sturdy barrier that gives mechanical support and helps anchor the brain to the skull. The other layers are softer in comparison: the arachnoid mater is a loose, web-like middle layer, and the pia mater is a very thin membrane that clings tightly to the brain’s surface. The space beneath the arachnoid, the subarachnoid space, contains cerebrospinal fluid and blood vessels. So when something is described as tough and fibrous, the dura mater is the one.