ABSTRACT
The nervous system can be divided structurally into
• The central nervous system (CNS) • The peripheral nervous system (PNS)
13.1.1.1 Central Nervous System The CNS consists of
• The brain • The spinal cord
It is well protected by the skull and vertebral column and the meninges (layers of connective tissue membrane):
• The dura mater-outermost layer • The arachnoid mater-middle layer • The pia mater-inner layer
Cerebrospinal uid (CSF) in the subarachnoid space offers further protection of the CNS.
