Fire with Fire: Girl, 7, 'cured' of leukemia after scientists turn her immune cells into 'guided missiles' to destroy the cancer | Immunopathology & Immunotherapy.
The Immune System - Naive at Nobelprize.org. Introduction The immune system is one of nature's more fascinating inventions. With ease, it protects us against billions of bacteria, viruses, and other parasites. Most of us never reflect upon the fact that while we hang out with our friends, watch TV, or go to school, inside our bodies, our immune system is constantly on the alert, attacking at the first sign of an invasion by harmful organisms. The immune system is very complex. It's made up of several types of cells and proteins that have different jobs to do in fighting foreign invaders. The Complement System The first part of the immune system that meets invaders such as bacteria is a group of proteins called the complement system.
Phagocytes This is a group of immune cells specialized in finding and "eating" bacteria, viruses, and dead or injured body cells. Lymphocytes - T cells and B cells On the surface of each lymphatic cell are receptors that enable them to recognize foreign substances. T cells B Cells Conclusion. Inmunología (a bit obsolete) Immune System (good but obsolete) Immune System (March 2001) Introduction Fluid Systems of the Body The Blood System The Lymph System Innate Immunity Surface Barriers or Mucosal Immunity Normal Flora Phagocytes Adaptive or Acquired Immunity Cell-mediated Immunity Humoral Immunity Summary Objectives Terms the student should know are in blue.
Introduction The human immune system is a truly amazing constellation of responses to attacks from outside the body. An antigen is any substance that elicits an immune response, from a virus to a sliver. The immune system has a series of dual natures, the most important of which is self/non-self recognition. Self/non-self recognition is achieved by having every cell display a marker based on the major histocompatibility complex (MHC). Sometimes the process breaks down and the immune system attacks self-cells. Go to the top Fluid Systems of the Body There are two main fluid systems in the body: blood and lymph. The Blood System Blood is composed of 52–62% liquid plasma and 38–48% cells. The Lymph System. What does your immune system do? Introduction to Immunology (Simple Stuff, Biology Project, Arizona) Timeline of immunology (Wikipedia, bueno) Respuesta inmunitaria: MedlinePlus enciclopedia médica. Es la forma como el cuerpo reconoce y se defiende a sí mismo contra bacterias, virus y sustancias que parecen extrañas y dañinas.
Información El sistema inmunitario protege al organismo de sustancias posiblemente nocivas, al reconocer y responder a los antígenos, que son sustancias (por lo general proteínas) que se encuentran en la superficie de las células, los virus, los hongos o las bacterias. Las sustancias inertes, como toxinas, químicos, drogas y partículas extrañas (como una astilla), también pueden ser antígenos. El sistema inmunitario reconoce y destruye sustancias que contienen antígenos. Las células corporales tienen proteínas que son antígenos, entre ellos un grupo llamado antígenos HLA. El sistema inmunitario aprende a ver estos antígenos como normales y por lo general no reacciona contra ellos.
La inmunidad innata, o inespecífica, es un sistema de defensas con el cual usted nació y que lo protege contra todos los antígenos. Nombres alternativos Referencias Firestein GS. SnapShots: The Archive | Cell Press. Immunology Overview (recent and good summary) Evolution of the Immune System The immune system consists of factors that provide innate and acquired immunity, and has evolved to become more specific, complex, efficient, and regulated. One of the principal functions of the human immune system is to defend against infecting and other foreign agents by distinguishing self from non-self (foreign antigens) and to marshal other protective responses from leukocytes.
The immune system, if dysregulated, can react to self antigens to cause autoimmune diseases or fail to defend against infections. Organization/Components/Functions The immune system is organized into discrete compartments to provide the milieu for the development and maintenance of effective immunity. Those two overlapping compartments: the lymphoid and reticuloendothelial systems (RES) house the principal immunologic cells, the leukocytes. Cells of the immune system intercommunicate by ligand-receptor interactions between cells and/or via secreted molecules called cytokines.