CNS = central nervous system (41 SNC;40 Central nervous system;41 SNC; It is a biological structure that is only found in individuals from the animal Kingdom. The central nervous system consists of the brain and spinal cord. It is protected by three membranes: dura mater ( outer membrane ) arachnoid 40 intermediate ) PIA mater ( membrane internal ) generically called meninges. In addition, the brain and spinal cord are protected by bony sheaths, which are the skull and vertebral column respectively. It's a very complex system, since it is responsible for perceiving stimuli from the outside world as well as transmit impulses to nerves and muscles instinctively. These organs cavities ( ventricles in the case of the brain and through ependymal cyst in spinal cord ) they are filled with colorless and transparent, fluid called cerebrospinal fluid. Its functions are varied: serves as means of exchange of certain substances, such as disposal of waste products, to keep the Ionic balance, carries oxygen, glucose from blood to brain cells and is also very important as mechanical damping system.
