<p>It is compromised of [[Primary Lymphoid Tissue - Anatomy & Physiology|primary]] and [[Secondary Lymphoid Tissue - Anatomy & Physiology|secondary]] lymphoid systems that are composed of lymphoid tissues that both mature and proliferate lymphocytes.</p> | <p>It is compromised of [[Primary Lymphoid Tissue - Anatomy & Physiology|primary]] and [[Secondary Lymphoid Tissue - Anatomy & Physiology|secondary]] lymphoid systems that are composed of lymphoid tissues that both mature and proliferate lymphocytes.</p> |