Human Immune System Essay Example for Free

Human Immune System EssayNone of these things are adequate to(p) to get in when your immune system is working, but the moment your immune system stops the entrance is wide open. Once you die it only takes a few weeks for these organisms to completely dismantle your body and extradite it away, until all thats left is a skeleton. The human immune system is made up of a consider of interdependent cell types which collectively protect the persons body from various parasitic, fungal, bacterial and viral infections, as head as from the growth of tumor cells. A number of these cell types have specialized functions, are able to kill parasites, rivet bacteria, or kill tumor cells or viral-infected cells. Frequently, these cells are dependent upon the, T, companion subset for activation signals in the form of secretions which are more formally referred to as, Lymphokines, Cytokines, or specifically as, Interleukins. An understanding of the T helper subset may assist in comprehe nsion of the root of immune deficiencies, as well as intelligence of the potential avenues that the human immune system can be modulated in the case of accompaniment diseases.Immune Response The presence of an APC, combined with a T cell or B cell, is involve in order for there to be an immune response to a foreign antigen. Should an APC flummox an antigen on its cell surface to a B cell, for example, the B cell is signaled to proliferate and produce antibodies. The antibodies and then specifically gravel to that antigen. If the antibodies bind to antigens on parasites or bacteria, it acts as a signal for macrophages or PMNs to engulf and kill them. One addition and important function of antibodies is to start something referred to as a, Complement Destruction Cascade. When antibodies bind to bacteria or cells, serum proteins referred to as, Complement, first bind to immobilized antibodies, and then destroy the bacteria finished creating holes in the bacteria. Antibodies may also signal macrophages and natural killer cells to kill bacterial infected cells or viral cells. Aids The fight between the virus and the immune system for supremacy is continuous. Our body responds to this onslaught through production of more T-cells, some of which mature to become helper T-cells.The virus eventually infects these targets and eliminates them, too. More T-cells are produced these too become infected, and are killed by the virus. This fight may continue for up to ten historic period before the body eventually succumbs, apparently because of the inability to any-longer produce T-cells. This loss of helper T-cells finally results in the complete inability of our body to ward-off even the weakest of organisms (all kinds of bacteria and viruses other than HIV) which are normally not always a problem to us. This acquired condition of immunodeficiency is called, AIDS.