GENERAL HISTOLOGY

Detailed explanation-1: -Three layers of membranes known as meninges protect the brain and spinal cord. The delicate inner layer is the pia mater. The middle layer is the arachnoid, a web-like structure filled with fluid that cushions the brain. The tough outer layer is called the dura mater .

Detailed explanation-2: -The subdural space is a space between your dura mater and your arachnoid mater. Under normal conditions, this space isn’t a space, but can be opened if there’s trauma to your brain (such as a brain bleed) or other medical condition. The subarachnoid space is a space between your arachnoid mater and pia mater.

Detailed explanation-3: -The subarachnoid space is the cerebrospinal fluid-filled space that exists between the arachnoid and the pia.

Detailed explanation-4: -The dura mater is composed of two layers: the periosteal/endosteal layer and the meningeal layer. The dural venous sinuses are between these two layers.

Detailed explanation-5: -The layers are the dura, arachnoid, and pia mater. The dura is a thick fibrous layer inside the surrounding bones, and the pia clings to the surface of the brain and spinal cord.