Lymphatic Tissues and Organs

• What are the 2 divisions of lymphatic tissues and organs?

  Primary lymphatic organs and secondary lymphatic organs and tissues
• Primary lymphatic organs: sites where stem cells divide and become immunocompetent.
• Immunocompetent: capable of mounting an immune response.
• What are the primary lymphoid organs?

  Red bone marrow and thymus
• Secondary lymphatic organs and tissues: sites where most immune responses occur
• What are the secondary lymphoid organs and tissues?

  Lymph nodes, lymphatic nodules (follicles), and spleen.