Adaptive immune system - Innate immune system - Humoral immune system - Cellular immune system Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... eMedicine is an online clinical medical knowledge base that was founded in 1996. ... The Medical University of South Carolina opened in Charleston, South Carolina in 1824 as a small private college for the training of physicians. ... Southern Illinois University is located in Carbondale in the U.S. state of Illinois. ... A scanning electron microscope image of a single neutrophil (yellow), engulfing anthrax bacteria (orange). ... Immunology is a broad branch of biomedical science that covers the study of all aspects of the immune system in all organisms. ... The immune system is the collection of organs and tissues involved in the adaptive defense of a body against foreign biological material. ... The innate immune system comprises the cells and mechanisms that defend the host from infection by other organisms, in a non-specific manner. ... Humoral immunity is the aspect of immunity that is mediated by secreted antibodies, produced in the cells of the B lymphocyte lineage (B cell). ... Cell-mediated immunity is an immune response that does not involve antibodies but rather involves the activation of macrophages and NK-cells, the production of antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen. ...

Lymphatic system - Inflammation - Complement system (Classical, Alternative, Lectin) - Cytokines - White blood cells - Antibody - Antigen - APC - MHC The human lymphatic system The lymphatic system is a complex network of lymphoid organs, lymph nodes, lymph ducts, lymph tissues, lymph capillaries and lymph vessels that produce and transport lymph fluid from tissues to the circulatory system. ... An abscess on the skin, showing the redness and swelling characteristic of inflammation. ... A complement protein attacking an invader. ... This article may be too technical for most readers to understand. ... The alternative pathway of the complement system is a humoral component of the immune systems natural defence against infections which can operate without antibody participation. ... Please wikify (format) this article as suggested in the Guide to layout and the Manual of Style. ... Cytokines are a group of proteins and peptides that are used in organisms as signaling compounds. ... White blood cells or leukocytes are cells which form a component of the blood. ... Each antibody binds to a specific antigen; an interaction similar to a lock and key. ... An antigen is a substance that stimulates an immune response, especially the production of antibodies. ... An antigen-presenting cell (APC) is a cell that displays foreign antigen complexed with MHC on its surface. ... MHC I (1hsa) vs MHC II (1dlh) (more details. ...

Immunity - Autoimmunity - Tolerance (Central) - Immunodeficiency Immunity is medical term that describes a state of having sufficient biological defenses to avoid infection, disease, or other unwanted biological invasion. ... Autoimmunity is the failure of an organism to recognize its own constituent parts (down to the sub-molecular levels) as self, which results in an immune response against its own cells and tissues. ... Immune or immunological tolerance is the process by which the immune system does not attack an antigen. ... Central tolerance is a condition caused by tumor cells caused by tumor antigens inhibiting the immune system which has no reaction. ... In medicine, immune deficiency (or immunodeficiency) is a state where the immune system is incapable of defending the organism from infectious disease. ...

Phagocyte - Reticuloendothelial system A phagocyte is a cell that ingests and destroys foreign matter such as microorganisms or debris via a process known as phagocytosis, in which these cells ingest and kill offending cells by a process analogous to cellular digestion, usually using lysosomes which carry potent enzymes that digests cell components such... The reticuloendothelial system (RES), part of the immune system, consists of the phagocytic cells located in reticular connective tissue, primarily monocytes and macrophages. ...

Allotype - Isotype - Idiotype The idiotype affects the variable region (labeled VL and VH in the diagram. ...