Saturday, January 21, 2012

Nervous System


                          
Nervous system is the body’s speedy, electrochemical communication system, consisting of all nerve cell of the peripheral and central nervous system. It is the sum totals of tissues that record and distributed information within individual. It is the complex network of neurons that regulates bodily processes and is ultimately responsible for all aspect of conscious experience. The nervous system can broadly be divided into central and peripheral nervous system.
1 Central Nervous System: The central nervous system is that part of the nervous system which consists of the brain and spinal cord. The brain is enclosed in the skull, and the spinal cord within the spinal canal of the vertebral column. Brain and spinal cord are joined at the base of brain so that there is a constant passage of signals to and from the brain. It has also two main parts are Brain and spinal cord.

2 Peripheral Nervous System: All of the nervous system outside the brain and spinal cord is known as peripheral nervous system. It is the portion of nervous system that connects internal organs and glands as well as voluntary and involuntary muscles to central nervous system. It has 31 pairs of spinal nerve and 12 pairs of cranial nerves to carryout it function. It also can be divided into two divisions are Somatic nervous system and Autonomic nervous system

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