is the dura mater meaning on the outside
Dura mater (UK /ËdjÊÉrÉ ËmeÉªtÉr/ or US /ËdÊÉrÉ Ëmaetr/), ËmÃ¦tr or, dura is a thick membrane that is the outermost of the three layers of the meninges that surround the brain and spinal. Cord it is derived from. mesodermhe other two meningeal layers are the arachnoid mater and the pia mater. The dura surrounds the brain and the spinal cord and is responsible for keeping in the cerebrospinal fluid.