The Immune System Essay -- essays research papers

The Immune SystemThe immune remains is a assemblage of cells, molecules, and tissues that helpdefend the body against diseases and other harmful encounterrs. The immune arrangingprovides protection against a variety of potentially damaging substances thatcan charge the body. These substances include disease-causing organisms, suchas bacteria, fungi, parasites, and viruses. The bodys ability to resist theseinvaders is called immunity. A unwrap feature of the immune corpse is its abilityto destroy foreign invaders plot of ground leaving the bodys own level-headed tissues alone.Sometimes, however, the immune system attacks and damages these healthy tissues.This reaction is called an autoimmune response or autoimmunity.The immune system is sedate of many parts that work together to fightinfections when pathogens or poisons invade the human body. Pathogens aredisease-causing organisms such as bacteria and viruses. The immune systemreacts to foreign substances through a series o f steps know as the immuneresponse. Any agent perceived as foreign by a bodys immune system is called anantigen. Several types of cells may be gnarly in the immune response toantigens.When an antigen enters the body, it may be partly modify bycomponents of the innate immune system. It may be attacked by phagocytes or byperformed antibodies that act together with the complement system. The humanimmune system cont...