It is compromised of [[Primary Lymphoid Tissue - Anatomy & Physiology|primary]] lymphoid organs which are responsible fot the production of lymphocytes and the [[Secondary Lymphoid Tissue - Anatomy & Physiology|secondary]] lymphoid organs which function to provide and environment where [[Lymphocytes - WikiBlood|Lymphocytes]] can react to antigen from the tissue fluid, blood and mucosal surfaces. | It is compromised of [[Primary Lymphoid Tissue - Anatomy & Physiology|primary]] lymphoid organs which are responsible fot the production of lymphocytes and the [[Secondary Lymphoid Tissue - Anatomy & Physiology|secondary]] lymphoid organs which function to provide and environment where [[Lymphocytes - WikiBlood|Lymphocytes]] can react to antigen from the tissue fluid, blood and mucosal surfaces. |