Lymph node

A lymph node diagram.

A Lymph node (IPA: [ lɪmf noʊd]) is an organ consisting of many types of cells, and is a part of the lymphatic system. Lymph nodes are found all through the body, and remove foreign (not of the body) objects from the body. Lymph nodes contain white blood cells. They are important for the correct use of the immune system.

Where They Are Found

A diagram that shows where lymph nodes are found in the human body.

In the human body, the most likely place where lymph nodes can be felt are the neck, underarms, and groin area.

Lymph Node Media

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  Cross-section of a lymph node with sections labelled.1) Capsule; 2) Subcapsular sinus; 3) Germinal centre; 4) Lymphoid nodule; 5) Trabeculae

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  Histology of a normal lymphoid follicle, showing dark, light, mantle and marginal zones.

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  Labeled diagram of human lymph node showing the flow of lymph.

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  Lymph node tissue showing trabeculae

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  Diagram of a lymph node showing lymphocytes.

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  A still image from a 3D medical animation showing enlarged lymph nodes.

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  Micrograph of a mesenteric lymph node with adenocarcinoma