The Definition of Nervous System is the brain and its constituent parts are the most complex system ever known in Human. In Psychology With one trillion separate cells, each one in a continuous process of changing in response to chemical signals. NERVOUS SYSTEM Central Nervous System (CNS) and Peripheral Nervous System (PNS) From the moment of conception to the moment of death, the biology of the individual is changing. It is in this complexity that our species has found the capability to store the accumulated experience of thousands of generations to create human culture. Our language, religions, governments, childrearing practices, humanistic approach in psychology technologies, economies are all man-made; yet all depend upon the remarkable capacity of the brain to make internal representations of the external world.
Biological Bases of Behavior
• The Nervous System
• Endocrine Glands
The Nervous system
• The system that controls and regulates the structure and function of the brain, spinal cord, nerves, and the nerve cells; it maintains coordination between the nervous system and the rest of the bodily systems.
• It is responsible for the internal communication system that ensures the integrated functioning of the various systems.
Some Interesting Facts about the Nervous system
• The nervous system consists of billions of highly specialized nerve cells called neurons.
• Nerve impulse is an electrical impulse that travels along the nerves at a speed of around 400km/ hour.
• Every second, a number of these impulses can pass along nerves.
• Brain cells never re grow; once destroyed or dead, they can not be replaced.
• Nerve fibers are very thin and fine in size; a hundred of them lying side by side would fit into just 1mm.
• The brain is divided into two visible parts or hemispheres; the left hemisphere controls the right side of the body, and the right controls the left side.
• The total surface area of the cerebral cortex is approximately 2.5sq.ft. if you spread it flat.