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Bone marrow, lymph nodes, spleen, tonsils, thymus and Peyer's patches in the small intestine, the liver, and the appendix are all parts of the lymphatic system.
Lymphatic System 1. All of the following organs actively FIGHT pathogens EXCEPT: a. Cervical lymph nodes b. Tonsils c. Spleen d. Thymus e. Axillary lymph nodes 2. T lymphocytes gain immunocompetence within the: a. Bone marrow b. Thyroid c. Spleen d. Bursa of Fabricius e. None of the above 3.