Equine Lymphoreticular System - Horse Anatomy
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Primary Lymphoid Tissue
Maturation of lymphocytes (lymphopoiesis) occurs in the primary lymphoid tissues, with different tissues responsible for maturing different types of lymphocyte.
Bone Marrow
Foetal Liver
Thymus
Secondary Lymphoid Tissue
Secondary (or peripheral) lymphoid tissues can also be referred to as lymphoid organs. They provide a site for immune responses to occur and are populated by relatively mature T cells and B cells, macrophages and dendritic cells with each tissue providing a different environment.