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Spleen
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Largest lymphoid organ in the body
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Plasma cells
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Secretes a copious amount of antibodies into the blood
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Macrophages
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Connective tissue cells that are phagocytes
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antibodies
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Protein compounds normally present in the body
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Memory cells
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Remain in reserve then turn into plasma cells when needed
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Complement
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Inactive proteins
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Clone
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Family of identical cells descended from one cell
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B cell
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Type of lymphocyte (humoral immunity)
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Interferon
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Synthetically produced to fight certain diseases
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Efferent
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Lymph exits the node through this lymph vessel
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Afferent
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Lymph enters the node through these lymph vessels
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T cell
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Type of lymphocyte (cell-mediated immunity)
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