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.

Detailed explanation-2: -The middle layer of meninges is arachnoid, a thin layer resembling a cobweb with numerous threadlike strands attaching it to the innermost layer. The space under the arachnoid, the subarachnoid space, is filled with cerebrospinal fluid and contains blood vessels.

Detailed explanation-3: -Thin elastic fibers, called the arachnoid, connect the dura mater to the pia mater, a thin membrane clinging to the surface of the brain and spinal cord. Because the brain is so soft and easily damaged, the cerebrospinal fluid plays an important protective role by acting as a shock absorber.

Detailed explanation-4: -The spinal arachnoid mater is a thin, delicate and avascular connective tissue membrane which forms the middle layer of the meninges and covers the spinal cord1.

Detailed explanation-5: -Arachnoid mater. The cranial arachnoid mater is a spiderweb-like meningeal layer, interposed between the dura and pia. The potential space between the arachnoid and dura is called the subdural space and according to some authors, it contains a very thin layer of fluid.