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Immune system - Understanding how human body defence system worksBY: Swati | Category: Health and Fitness | Post Date: 2008-09-22
Our atmosphere is composed of millions of tiny intruders (bacteria, toxins, pathogens, viruses etc..) and our body is constantly under the attack of these tiny organisms. Immune system is a very complex, super intelligent and a sophisticated defense system our body to fight all these unwanted intruders. A common example on how our immune system works can be seen the way our body reacts if you get hurt (say you get a cut which punctures your skin), the body immediately starts to fight the intruders / bacteria trying to attack that damaged portion of your skin, but our immune system fights back and then it seals the puncture, and in just a few days it heals the skin. How does our Immune system work? We will try to keep our explanation simple to keep it within the scope of this article. Most of our immune system cells responsible for our defense are called white blood cells, they help to destroy infected cells and coordinate the overall response. Another key component are the antibodies which are released to destroy the invading intruder (bacteria, parasite etc..). Both white blood cells and antibodies keep circulating in our blood all the time. Our body produces different types of antibodies for different intruders, an antigen is a substance that prompts the generation of antibodies. Antibodies are produced by B-cells in the lymph nodes or spleen. The antibody will destroy the intruder, but if antibody is not able to destroy the intruder itself, it tells the white blood cells to do that job. White blood cells form about 1% of our blood and there are several different types of white blood cells. Immune System's Memory: Our immune system also has some kind of inbuilt memory, it may take a while for our body to react to an absolutely new intruder but then it seems to remember the "bugger" for atleast a while, therefore the response time of immune system to generate the antibody to deal with this intruder will be much better if it attacks us again in future. This idea is also used during flu shots vaccine - we are exposed to a lower levels of prevailing infections and bacteria so that our body destroys them easily and learns to fight them next time. So during that season if you get exposed to those infections, the response rate of our immune system will be so quick that you will likely not get ill at all. What if there was no immune system: We would probably will die in a matter of minutes. Think about this when someone dies, their immune system stops functioning immediately and the dead body comes under the attack of bacteria, parasites instantly, if the body is left in open or burried, in just a month or so the only thing left is a skeleton. Article Source: http://www.saching.com About Author / Additional Info: Additional Articles: * How to get friendly with a shy girl * Anxiety attacks: How to treat Anxiety disorder naturally * Foods that should not be given to children: * Creative ideas for Gift baskets * How to control joint pain? Reasons of pain and Natural ways to cure Does this article violate or infringe on your copyright ? It is a violation of our terms for authors to submit content which they did not write and claim it as their own. If this article infringes on your copyrights, then use our Contact us form with the detailed proof of infringement along with the offending article's title, URL and writer name. If you do not hear back from us then contact us again in another 10 days. Thank you. Comments on this article: (0 comments so far) * Additional comments are now closed for this article *
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