👉 In medical terminology, meninges refer to the layers of tissue that surround and protect the brain and spinal cord. These structures are primarily composed of two main types: the arachnoid mater and the ependyma. The arachnoid mater is a fluid-filled layer that surrounds the brain and spinal cord, protecting it from external pressure and facilitating its movement. The ependyma, on the other hand, is a fibrous tissue that lines the ventricles and helps to
