<prompt> Dura Mater derives its name fromLeather like appearanceDouble layered motherTender motherTough mother  <response>: D Tough mother Dura mater, or dura, is the outermost of the three layers of the meninges surrounding the brain and spinal cord. It is derived from Mesoderm. Other two meningeal layers are the pia mater and the arachnoid mater. Dura surrounds the brain and the spinal cord and is responsible for keeping in the cerebrospinal fluid. Name dura mater is derived from the Latin hard mother or tough mother, and is also referred to by the term pachy-meninx. 