THORAX ABDOMEN AND PELVIS

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 meninges are three protective membrane layers surrounding the brain and spinal cord. They are composed of the pia (closest to the CNS), arachnoid, and dura (outermost layer), and contain blood vessels and enclose the cerebrospinal fluid.

Detailed explanation-3: -The three layers of connective tissues covering and protecting the brain and the spinal cord are called meninges. The pia mater is the innermost layer, the arachnoid layer is the middle one and the outermost layer is the dura mater.