Blood, Lymph, and Immune System

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Anaphylaxia

exaggerated, life-threatening hypersensitivity reaction to a previously encountered antigen

antibody

protective protein produced by B lymphocytes in response to the presence of a foreign substances called an antigen, which the immune system regards as harmful to the host

antigen

substance that is recognized as harmful to the host and stimulates the formation of antibodies in an immunocompetent individual

cellular immunity

acquired specific resistance, mediated by T cells, that produces reactive substances or directly exerts a cytotoxic effect on a cell that is identified as harmful

host

organism in or on which another, usually parasitic, organism is nourished and harbored

hummoral immunity

acquited specific resistance, mediated by B cells, that produces antibodies that bind to and dispose of antigens

immunocempetent

able to develop an immune response; abled to recognize antigens and respond to them

immunopathology

study of disease states associated with overreactivity or underreactivity of the immune response

opportunistic infection

infection occurring in a person with a weakend immune system and caused by a microorgansim that, under normarl conditions, would not bring about disease

palliative treatment

treatment that provides relief, but not a cure

serum

lipid portions of blood that remains after the removal of fibrinogen