The lymphoid organs represent sites in the body in which lymphocytes are concentrated. They are divided into primary and secondary lymphoid organs 1.
Primary
Primary lymphoid organs are responsible for the generation of new lymphocytes:
Secondary
Secondary (a.k.a. peripheral) lymphoid organs are responsible for the maturation of lymphocytes:
- lymph nodes
- spleen
-
mucosa-associated lymphoid tissue (MALT)
- tonsils, Peyer patches, etc.
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