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Nervous System -- Meninges and CSF
outermost meninx covering the brain; composed of tough fibrous connective tissue; outer layer forms periosteum of skull
innermost meninx covering of the brain; delicate and highly vascular
structures instrumental in returning cerebrospinal fluid to venous blood in dural sinuses
middle meninx; cobweb-like in structure; secures arachnoid to pia mater
dual fold that attaches the cerebrum to crista galli of skull; in longitudinal fissure
dural fold separating cerebrum from cerebellum; over cerebellum and in trasverse fissure
superficial layer of dura mater attached to inner surface of skull
deeper layer of dura mater forms true external covering of brain
dural fold along vermis of cerebellum
between arachnoid mater and pia mater; contains CSF and blood vessels
found in and around brain and spinal cord; reduces brain weight by 97%; prevents brain from crushing under its own weight
produces CSF at constant rate; clusters of capillaries enclosed by pia mater and a layer of ependumal cells
maintains stable environment for brain; separates neurons from some bloodborne substances