Dura mater

A) Functional unit of the nervous system
B) Most superficial and thickest meninx
C) The middle meninx
D) The meninx bound tightly to brain and spinal cord
E) Separates dura mater from periosteum

Dura Mater

The outermost, tough layer of the meninges that envelops the brain and spinal cord, providing protection.

Meninx

Meninx (plural, meninges) refers to one of the three membranes (the dura mater, arachnoid mater, and pia mater) that cover the brain and spinal cord.

Periosteum

The periosteum is a dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints, serving as a site for attachment for muscles and bones.