Medical genetics 15免疫缺陷 immunodeficiency
Medical Genetics
Medical genetics The immune system is a network of interacting cellular and soluble components. Its function is to distinguish entities within the body as self or nonself and to eliminate those that are nonself
Medical Genetics The immune system is a network of interacting cellular and soluble components. Its function is to distinguish entities within the body as "self" or "nonself" and to eliminate those that are nonself
Medical genetics Microorganisms are the principal nonself entities, but neoplasms transplants, and certain foreign substances(eg, some toxins )are also important. To accomplish its tasks, the immune system has evolved two mechanisms: nonspecific immunity and specific immunity, which are linked to and nfluence each other
Medical Genetics Microorganisms are the principal nonself entities, but neoplasms, transplants, and certain foreign substances (eg, some toxins) are also important. To accomplish its tasks, the immune system has evolved two mechanisms: nonspecific immunity and specific immunity, which are linked to and influence each other
Medical genetics Nonspecific (Innate) Immunity This type of immunity is older phylogenetically, is present at birth does not require a previous encounter with the offending substance, and does not develop memory Innate immunity includes barriers, such as the skin and chemical protection, such as gastric acid
Medical Genetics Nonspecific (Innate) Immunity This type of immunity is older phylogenetically, is present at birth, does not require a previous encounter with the offending substance, and does not develop memory. Innate immunity includes barriers, such as the skin, and chemical protection, such as gastric acid
Medical genetics There are two cellular components: (1)the phagocytic system, whose function is to ingest and digest invading microorganisms, and (2) natural killer(nk) cells, whose function is to kill some tumors, microorganisms, and virally infected cells. The soluble components consist of complement proteins, acute phase reactants, and cytokines
Medical Genetics There are two cellular components: (1)the phagocytic system, whose function is to ingest and digest invading microorganisms, and (2) natural killer (NK) cells, whose function is to kill some tumors, microorganisms, and virally infected cells. The soluble components consist of complement proteins, acute phase reactants, and cytokines