lymphatic organ on the left side of the abdomen under the diaphragm
causes T cells to work in immune response; stops growth in adolescence then atrophies.
ring of lymphatic tissue around the entrance to the throat
Clusters in ileum (distal part) of small intestine that contain macrophages to ingest bacteria
Protein-containing fluid transported by lymphatic vessels
Ability of the immune system to recognize specific antigens by binding;reflects the presence of plasma membrane-bound receptors
Lymphocytes that mediate cellular immunity; include helper, cytotoxic, regulatory, and memory cells.
movement of a cell, organism, or part of an organism toward or away from a chemical substance
If autoimmunity, production of antibodies and T cells that destroy its own tissues, results in a disease state
abnormally high body temperature
no foreign or antigenic to oneself but antigenic to others
Process during which a B cell or T cell becomes sensitized through binding contact with an antigen
An additional dose of a vaccine needed periodically to "boost" the immune system.
an incomplete antigen; has reactivity but not immunogenecity
Engulfing of foreign solids by phagocytic cells
A life-threatening allergic reaction characterized by a swelling of body tissues including the throat, difficulty in breathing, and a sudden fall in blood pressure.
oversee humoral immunity; their descendants differentiate into antibody-producing plasma cells
short lived immunity resulting from the introduction of "borrowed antibodies" obtained from an immune animal or human donor; immunological memory is not established
The first lymph node ("gland") to receive lymphatic drainage from a tumor.
nonspecific defense system
A substance that is foreign to the body and can cause an allergic reaction in certain people
passage of white blood cells through intact vessel walls into tissue
chemical mediators involved in cellular immunity
destruction or decomposition, as of a cell or other substance, under influence of a specific agent.
a substance or part of a substance that is recognized as foreign by the immune system, activates the immune system, and reacts with immune cells or their products
Member of a B cell clone; specialized to produce and release antibodies
is the creation of a genetically identical copy of an existing human or growing cloned tissue from that individual
Responses are customized for specific pathogens, and some memory cells stay around after the infection to speed up future immune responses.
a protein molecule that is released by a plasma cell and that binds specifically to an antigen; an immunoglobulin
a group of bloodborne proteins, which, when activated, enhance the inflammatory and immune responses and may lead to cell lysis
chemicals that are directly toxic to cells, preventing their reproduction or growth.