A clear, pale yellow fluid formed from tissue fluid that enters lymphatic vessels; contains white blood cells, especially lymphocytes.

A network of vessels, organs, and tissues that returns excess fluid to the bloodstream and helps defend the body against infection.

Thin tubes that carry lymph; similar to veins but with thinner walls and more valves.

Small, closed-ended vessels where lymph first enters; found in most tissues.

Small, bean-shaped organs that filter lymph and remove bacteria, viruses, and cancer cells.

Organ behind the sternum; where T-lymphocytes mature. Largest in children.

The body’s ability to resist pathogens.

Any foreign substance (like bacteria, toxins, viruses) that triggers an immune response. Antibody

Swelling caused by excess fluid in tissues.

Swelling due to blocked lymphatic drainage (often from surgery or infection).

Process where cells like macrophages “eat” pathogens.

Fast, non-specific defense (skin, mucus, inflammation, fever).

Specific, learned defense (T cells, B cells, antibodies).

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Lymph & Lymphatic

Term	Definition
Lymph	A clear, pale yellow fluid formed from tissue fluid that enters lymphatic vessels; contains white blood cells, especially lymphocytes.
Lymphatic System	A network of vessels, organs, and tissues that returns excess fluid to the bloodstream and helps defend the body against infection.
Lymphatic Vessels	Thin tubes that carry lymph; similar to veins but with thinner walls and more valves.
Lymph Capillaries	Small, closed-ended vessels where lymph first enters; found in most tissues.
Lymph Nodes	Small, bean-shaped organs that filter lymph and remove bacteria, viruses, and cancer cells.
Thymus	Organ behind the sternum; where T-lymphocytes mature. Largest in children.
Immunity	The body’s ability to resist pathogens.
Antigen	Any foreign substance (like bacteria, toxins, viruses) that triggers an immune response. Antibody
Edema	Swelling caused by excess fluid in tissues.
Lymphedema	Swelling due to blocked lymphatic drainage (often from surgery or infection).
Lymphadenitis	Inflammation of lymph nodes.
Phagocytosis	Process where cells like macrophages “eat” pathogens.
Innate Immunity	Fast, non-specific defense (skin, mucus, inflammation, fever).
Adaptive Immunity	Specific, learned defense (T cells, B cells, antibodies).

Created by: latoyalewis

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