Dictionary of Human Evolution and Biology

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Lymph Node

Aggregation of soft lymphatic tissue surrounded by a fibrous capsule; nodes are located throughout the body along the course of the lymphatic drainage network, with some concentrations such as in the axillary region. Lymph nodes produce immune cells and filter the noxious elements collected in lymph while resident lymphocytes and macrophages respond to filtered foreign particles. When bacteria are recognized in the lymph fluid, the lymph nodes enlarge as they produce additional white blood cells to help fight infection. Aka lymph gland.

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