| A | B |
| Abscess | accumulation of pus in a confined space not open to the outside |
| Acquired | type of immunity obtained by exposure to antigens |
| Adherence | attachment to the microbe plasma membrane by a phagocyte |
| Allergens | antigens that provoke an allergic reaction |
| Anaphylaxis | immediate |
| Antibody | protein that forms in response to an antigen |
| Antigen | foreign substance |
| Autoimmune | condition in which the body loses its sense of self; begins attacking own cells |
| B cells | develop in the bone marrow; produce antibodies |
| Chemotaxis | chemical attraction for phagocytes |
| Complement system | group of proteins which enhance immune |
| Cytokines | small protein hormones involved in immune responses |
| Cytotoxic | death of cells due to an antibody-antigen reaction |
| Elephantiasis | blockage of the lymphatic system by parasitic worms |
| Endogenous | synthesized inside the body |
| Epitope | small part of an antigen that triggers the immune response |
| Exogenous | formed outside the body |
| Fever | abnormally high body temperature |
| Hapten | substance which cannot trigger an immune response unless it's attached to a body protein |
| Histocompatibility | similarity of MHC antigens on body cells of different individuals |
| hypersensitivity | n allergic response; over reaction to a substance that is tolerated by most people |
| immunity | specialized resistance to a specific disease |
| immunogenicity | ability to provoke an immune response |
| immunology | science of the immune response |
| inflammation | local response to a foreign antigen |
| ingestion | actual eating of microbe; phagosome develops |
| innate | type of immunity which is inherited |
| interferon | substance produced by body cells infected with viruses |
| interstitial | fluid found in the tissues |
| lacteal | lymphatic capillary in villus of small intestine |
| lymph | fluid found in the lymphatic system |
| lymphomas | cancers of the lymph nodes |
| mastitis | infection of the lymphatics of the breast |
| natural killer | cell that attacks microbes |
| nonspecific resistance | defense mechanisms that provide general protection against a wide range of pathogens (two words) |
| phagocytes | eat microbes; neutrophils and macrophages |
| pus | dead phagocytes; damaged tissues and tissue fluid |
| reactivity | ability to react to cells or antibodies formed in an antigen response |
| resistance | ability to ward off the pathogens that produce disease |
| susceptibility | lack of resistance |
| T cells | develop in the thymus; important in cell-mediated responses |
| Ulcer | open sore |