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10.4: Glossary- The Immune System

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    adaptive immune response relatively slow but very specific and effective immune response controlled by lymphocytes

    afferent lymphatic vessels lead into a lymph node

    antibody antigen-specific protein secreted by plasma cells; immunoglobulin

    antigen molecule recognized by the receptors of B and T lymphocytes

    barrier defenses antipathogen defenses deriving from a barrier that physically prevents pathogens from entering the body to establish an infection

    B cells lymphocytes that act by differentiating into an antibody-secreting plasma cell

    bone marrow tissue found inside bones; the site of all blood cell differentiation and maturation of B lymphocytes

    bronchus-associated lymphoid tissue (BALT) lymphoid nodule associated with the respiratory tract

    chyle lipid-rich lymph inside the lymphatic capillaries of the small intestine

    cisterna chyli bag-like vessel that forms the beginning of the thoracic duct

    efferent lymphatic vessels lead out of a lymph node

    germinal centers clusters of rapidly proliferating B cells found in secondary lymphoid tissues

    high endothelial venules vessels containing unique endothelial cells specialized to allow migration of lymphocytes from the blood to the lymph node

    immune system series of barriers, cells, and soluble mediators that combine to response to infections of the body with pathogenic organisms

    innate immune response rapid but relatively nonspecific immune response

    lymph fluid contained within the lymphatic system

    lymph node one of the bean-shaped organs found associated with the lymphatic vessels

    lymphatic capillaries smallest of the lymphatic vessels and the origin of lymph flow

    lymphatic system network of lymphatic vessels, lymph nodes, and ducts that carries lymph from the tissues and back to the bloodstream.

    lymphatic trunks large lymphatics that collect lymph from smaller lymphatic vessels and empties into the blood via lymphatic ducts

    lymphocytes white blood cells characterized by a large nucleus and small rim of cytoplasm

    lymphoid nodules unencapsulated patches of lymphoid tissue found throughout the body

    mucosa-associated lymphoid tissue (MALT) lymphoid nodule associated with the mucosa

    naïve lymphocyte mature B or T cell that has not yet encountered antigen for the first time

    natural killer cell (NK) cytotoxic lymphocyte of innate immune response

    plasma cell differentiated B cell that is actively secreting antibody

    primary lymphoid organ site where lymphocytes mature and proliferate; red bone marrow and thymus gland

    right lymphatic duct drains lymph fluid from the upper right side of body into the right subclavian vein

    secondary lymphoid organs sites where lymphocytes mount adaptive immune responses; examples include lymph nodes and spleen

    spleen secondary lymphoid organ that filters pathogens from the blood (white pulp) and removes degenerating or damaged blood cells (red pulp)

    T cell lymphocyte that acts by secreting molecules that regulate the immune system or by causing the destruction of foreign cells, viruses, and cancer cells

    thoracic duct large duct that drains lymph from the lower limbs, left thorax, left upper limb, and the left side of the head

    thymocyte immature T cell found in the thymus

    thymus primary lymphoid organ; where T lymphocytes proliferate and mature

    tonsils lymphoid nodules associated with the nasopharynx

    Contributors and Attributions

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    • Glossary: The Immune System. Authored by: Kelly, Jessica. Provided by: Herkimer College. Located at: NA. Project: AtD. License: CC BY: Attribution

    10.4: Glossary- The Immune System is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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