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 100's season 2 finale saw Clarke (Eliza Taylor) and Bellamy (Bob Morley) using radiation to kill all the Mountain Men, including Maya (Eve Harlow). By the end of the episode, Clarke decides to leave Camp Jaha. Here is the synopsis which summarises season 2's plot and teases what is ahead for season 3.For two seasons, the refugees of The 100 sent to Earth have been at war. First with themselves, then with the Grounders, and finally with Mount Weather.Many have lost their lives along the way.ere is the synopsis which summarises season 2's plot and teases what is ahead for season 3. For two seasons, the refugees of The 100 sent to Earth have been at war. First with themselves, then with the Grounders, and finally with Mount Weather. Many have lost their lives along the way.