The nervous system is an arrangement of specific cells that corresponds information in relation to an organism's environs and itself. The central nervous system (CNS) on its part is the fraction of the nervous system.
The CNS is enclosed inside the dorsal nook, with the brain in the cranial cavity. There are two main components of the central nervous system, which account for the spontaneous events as well as subliminal thoughts of humans. In other word, the central nervous system is in charge of all the cerebral tasks.
Being the power house, the central nervous system consists of unquantifiable nerve cells referred to as the neurons. Each one of the neurons comprises of a nucleus, and all these are linked by means of a frail set-up of nerves. As a power-house, the central nervous system is well confined and secured. How then does the central nervous system gain its protection? External injuries are overcome by the central nervous system through protective shields. The spinal cord is encased in the vertebral column, and it is also surrounded by a fluid known as cerebrospinal fluid. The same fluid is also present in the cranium around the brain. In addition, the brain and spinal cord are guarded by layers of tissue described as meninges, which is secluded by blood as an obstruction.
The blood fence thwarts the disease-causing cells from gaining entry to the brain. And, in cases of accidents involving the hitting of the head against hard surfaces, the exterior part of the brain which is known as the cranium shields the central nervous system. It is capable of achieving this feat as a result of its inflexibility.
Apart from this, there are, beneath the cranium, mitigated layers of blood and tissue, which affords extra fortification to the central nervous system.
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