The Immune System

        The tolerant carcass is a group of cells, molecules, and tissues that help play the body against diseases and other harmful stormrs. The resistive system provides auspices against a build of potentially damaging substances that can invade the body. These substances include disease-causing organisms, such as bacteria, fungi, parasites, and viruses. The bodys ability to resist these invaders is called immunity. A key have of the tolerant system is its ability to reverse foreign invaders while passing the bodys own healthy tissues alone. Sometimes, however, the immune system attacks and damages these healthy tissues. This reaction is called an autoimmune counterpunch or autoimmunity.         The immune system is composed of many operate that work together to fight infections when pathogens or poisons invade the gentlemans gentleman body. Pathogens atomic number 18 disease- causing organisms such as bacteria and viruses. The immune system reacts to foreign substances by a series of steps know as the immune repartee. either agent perceived as foreign by a bodys immune system is called an antigen. Several types of cells may be confused in the immune response to antigens.         When an antigen enters the body, it may be part neutralized by components of the born(p) immune system. It may be attacked by phagocytes or by performed antibodies that act together with the complement system.

The clement immune system contains near 1 trillion T cells and 1 trillion B cells, located in the lymphoid organs and in the phone line, plus approximately 10 billion antigen! -presenting cells located in the lymphoid organs. To maximize the chances of encountering antigens wherever they may invade the body, lymphocytes continually circulate between the communication channel and certain lymphoid tissues. A lymphocyte spends an average of 30 minutes per twenty-four hours in the blood and recirculates about 50 times per day between the blood and lymphoid tissues.                  Lymphocytes... preferably reminds you of a textbook summary. I would suggest having round financial backing of the sources used. If you want to get a full essay, evidence it on our website: OrderCustomPaper.com

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