In the central nervous system, there are three different layers that cover the spinal cord and brain. These are called the meninges, and their three levels consist of the: pia, arachnoid, and dura mater. Bone is situated above these layers, followed by periosteum (a fibrous membrane that covers bone) and skin.The dura mater is the top layer of the meninges, lying beneath the bone tissue.This material at times opens into sinus cavities (spaces) located around the skull.he dura mater is the top layer of the meninges, lying beneath the bone tissue. This material at times opens into sinus cavities (spaces) located around the skull.
Planet Earth Making Mountains Planet Earth filmmakers came out in the rugged mountains of Nepal in hopes of filming the elusive snow leopard for the Mountains episode. 01:51.
The final showdown between Karl and TT, is supposed to be in the UK, given the UK fire engine and police presence, above ground shots are filmed at Samphire Hoe, the location of Eurotunnel's UK ventilation system. However the 'shaft' scenes take place in Eurotunnel's French ventilation shaft. There is no such shaft on the UK side. See more Â».