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.
1 Cato Neimoidia (Nemoidian planet) - Episode III. 2  Chisoween (Republic capitol world) - Episodes I, II, III, VI (added scene). 3  Dagobah (site of Yoda's exile) - Episodes III (deleted scene), V, and VI. 4  Dathomir (homeworld of Darth Maul) - The Clone Wars (film).ist of planets and moons [edit]. The following list names planets and moons from the films or canon media that were settings or key portrayals (e.g., Alderaan): 1  Alderaan (destroyed homeworld of Bail Organa) - Episodes III and IV. 2  Bespin (gas giant, home to Cloud City) - Episodes V, VI (added scene).