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Sunday, March 28, 2010

The Nervous System

Function:

The nervous system is how your body makes adjustments and changes. Any change brings a response called stimuli. Examples of stimuli are a noise, light, smell of food. Homeostasis helps maintain the body.
The nervous system has two main functions:
  • to gather information.
  • respond to information.
There are two parts to the nervous system: the central nervous system, which consists of your brain and spinal cord, and the peripheral nervous system, which is all the other parts of the system except for the brain and spinal cord. The central nervous system would act as the control system, and the peripheral nervous system would send the information out to the rest of your body.
Organs:
Eyes
Hearts
Lungs
Brain
Intestines
More about the Brain:
The brain is made up of 100 million neurons (neurons are the main aspect of the system). The brain includes the cerebrum, the cerebellum, and the brain stem .The brain is like the "main post" of the whole system. When it receives information, it tells the rest of your body how to react.
Tissues that make up the brain:
Connective Tissue
Nervous Tissue
Interactions with other systems:
  • Interacts with the skeletal system and or muscular system, because the responding can be with movement, and the skeletal system has to do with movement in your body.
  • Interacts with excretory system because that system is responding to all the excess waste by removing it from your body.
The brain and the spinal cord receive the information (the central nervous system), and the rest of your body (everything green; the peripheral nervous system) respond to the information.
Diseases, Disorders & Other Diseases:
  • An injury could be a spinal cord injury, which can block information to and from the brain.
  • Depressants, such as alcohol and some drugs, can slow down your nervous system, causing you to respond slower than you normally would.


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