Which organ is the main organ to filtrate blood? A: Liver B: Lymph node C: Spleen D: Thymus E: Tonsil

Which one of the following structures is not the lymphatic organ?() A: the lymph node B: the aggregated lymphatic follicle C: the palatine tonsil D: the spleen E: the thymus

The peripheral immune organs include A: Lymph node,Spleen, and Bone marrow B: Thymus, Spleen, and MALT C: Bursa of Fabricius,Spleen,and Tonsil D: Spleen, Lymph node, and MALT E: Appendix, Bone marrow, and Lymph node