Central Nervous System

Topics: Neuron, Central nervous system, Nervous system Pages: 3 (1222 words) Published: July 7, 2009
The central nervous system (CNS) is that portion of the vertebrae nervous system that is composed of the brain and spinal cord. Together with the peripheral nervous system (PNS), the other major portion of the nervous system, the CNS coordinates the body's interaction with the environment. The CNS is contained within the dorsal cavity, with the brain in the cranial subcavity (the skull), and the spinal cord in the spinal cavity (within the vertebral column). Then human nervous system is the most complex object know to science, as it includes the intricate CNS and a brain with 10 billion neurons and many times more interneural connections (Anissimov 2007). For some people, this brain and the increase in intelligence it signifies is what separates human being from other animals. As the difference is mainly a quantitative one, the gulf between humans and the great ape is seen as small, to the point that there is some advocacy to have chimpanzees placed in the same genus as human beings and great apes to be considered "persons" that should be accorded "human rights." However, for adherents of many religions, human beings are separated qualitatively from the rest of the animal world by having a spiritual nature and the presence of a soul or spirit, which exists in harmony with the body and CNS, but also transcends the physical aspect. For such, it is this spiritual aspect that defines the nature of humans more than the complex central nervous system. The nervous system is that network of specialized cells, tissue, and organs that coordinates the body's interaction with the environment, such as sensing the environment, monitoring organs, and coordinating the activity of muscle. The nervous system of vertebrate animals is divided into the central nervous system and the peripheral nervous system(PNS). The CNS comprises the brain and spinal cord, whereas the PNS consists of the nerves and neurons that reside or extend outside the central nervous system, such as to serve...
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