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The resistant System      The resistant brass is a conclave of cells, molecules, and tissues that assist defend the body against diseases and other harmful overflowrs much(prenominal) as viruses and bacteria and toxins. The repellent system provides protection against a mixed bag of potentially damaging substances that privy invade the body. These substances include disease-causing organisms, such(prenominal) as bacteria, fungi, parasites, and viruses. The bodys ability to resist these invaders is called immunity. A key chemic element of the repellent system is its ability to destroy distant invaders art object lens leaving the bodys own healthy tissues alone. Sometimes, when the resistant system attacks and reparation these healthy tissues. This reaction is called an autoimmune retort or autoimmunity.The immune system is composed of many split that work in concert to support infections when pathogens or poisons invade the human body. Pathogens are disease -causing organisms such as bacteria and viruses. The immune system reacts to foreign substances through a series of travel know as the immune response. all agent sensed as foreign by a bodys immune system is called an antigen. In Which the body works to fight it .and when the body cant fight the attacker or foreign object or attacks itself then we have a problem of immune deficit . Works Cited Direct Essays. tolerant System is the just about Incredible Part of our Body. DirectEssays.com. DirectEssays.com, (January 01, 2000). Web. 14 Sep. 2012. Clemems DL and MA Horwitz.  1993.  Hypoexpression of major histocompatibility complex molecules on Legionella pneumophila phagosomes and phagolysosomes.  transmission and Immunity  Brain, Marshall. How Your Immune System Works. How Stuff Works. 1 April 2000. breakthrough Health. 4 October 2010 <http://health.howstuffworks.com/human-body/systems/immune/immune-system.htm>.If you want to get a full essay, order it o n our website: OrderEssay.net

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