system overload

1. The Central Nervous system

The central nervous system (CNS) is the processing center for the nervous system. It receives information from and sends information to the peripheral nervous system. The two main organs of the CNS are the brain and spinal cord. The brain processes and interprets sensory information sent from the spinal cord. Both the brain and spinal cord are protected by three layers of connective tissue called the meninges (Bailey).

Main Components of the Nervous System

The nervous system is broadly divided into central and peripheral parts which are continuous with each other. The central system is the processing center of the body which consists of the brain, and the spinal cord. The peripheral nervous system is the nervous system that is outside the brain and the spinal cord.

Brain, Spinal Cord, and the Neuron

1. The brain is the control center of the body. It consists of three main components: the fore brain, the brain stem, and the hind brain. The fore brain is responsible for a variety of functions including receiving and processing sensory information, thinking, perceiving, producing and understanding language, and controlling motor function. The fore brain contains structures such as the thalamus and hypothalamus which are responsible for such functions as motor control, relaying sensory information, and controlling autonomic functions. It also contains the largest part of the brain, the cerebrum. Most of the actual information processing in the brain takes place in the cerebral cortex (Bailey).

2. The spinal cord is a cylindrical shaped bundle of nerve fibers that is connected to the brain. The spinal cord runs down the center of the protective spinal column extending from the neck to the lower back. Spinal cord nerves transmit information from body organs and external stimuli to the brain and send information from the brain to other areas of the body. The nerves of the spinal cord are grouped into bundles of nerve fibers that travel in two pathways. (Bailey).

3. The cells that make up the nervous system are called neurons. Long, stringy neurons are perfect for carrying the electrical messages that are the "language" of the nervous system.

The Nervous System

The functions of the Nervous system

It controls and regulates all activities of the body, whether voluntary or involuntary, and adjusts the individual (organism) to the given surroundings.

The nervous system is a collection of cells, tissues, and organs through which an organism receives information from its surroundings and then directs the organism as to how to respond to that information (Bailey).

Bibliography

copyright 2012 Advameg, INC,” Nervous System”, November 29, 2012, http://www.scienceclarified.com/Mu-Oi/Nervous-System.html#b

Copyright 2000-2011 buzzle.com,”Nervous system functions”, November 29, 2012, http://www.buzzle.com/articles/nervous-system-function.html

Copyright2001 by MJ, Farabee, “The Nervous System”, December 03, 2012, http://www.emc.maricopa.edu/faculty/farabee/biobk/biobooknerv.html

Dr Gary Farr, “The Nervous System”, December 03, 2012, http://www.becomehealthynow.com/article/bodynervousadvanced/826

Regina bailey, “Nervous system Peripheral Nervous system”, December 11, 2012, http://biology.about.com/od/organsystems/a/aa061804a.htm

Regina bailey, “Nervous system Central Nervous system”, December 11, 2012, http://biology.about.com/od/organsystems/ss/central-nervous-system.htm

“Hillendale Health”, December 13, 2012, http://hes.ucfsd.org/gclaypo/nervoussys.html

Conclusion

Peripheral nervous system connections with various organs and structures of the body are established through cranial nerves and spinal nerves. There are 12 pairs of cranial nerves in the brain that establish connections in the head and upper body, while 31 pairs of spinal nerves do the same for the rest of the body. While some cranial nerves contain only sensory neurons, most cranial nerves and all spinal nerves contain both motor and sensory neurons (Bailey).

I talked about the Nervous system and the functions, the main components of the nervous system, the parts of the nervous system, and why do we need it. We really need the nervous system because it is responsible for controlling the body activities. For example, if we don't have the nervous system then we wont be able to feel, move, think, or taste. Also we wont be able to feel anything such as if we put our hand in a hot pan, we wont feel it. We also wont be able to move at all.

2. The Peripheral Nervous system

The nervous system of the human being is responsible for sending, receiving, and processing nerve impulses throughout the body. All the organs and muscles inside your body rely upon these nerve impulses to function. It could be considered as the master control unit inside your body. Sense organs provide the nervous system with information about the environment by means of such senses as sight, hearing, smell, taste, tough, pressure, and pain (Gary).

Why do we need Nervous system