Which of the following is not considered to be a major part of the immune system?

Question

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The pancreas is not considered to be a major part of the immune system. The thymus, bone marrow, spleen, and lymph nodes are all key components of the immune system. The thymus produces T cells, while the bone marrow produces B cells and white blood cells. The spleen filters blood and helps fight infections, and lymph nodes also filter lymph and help to activate immune responses.

Which of the Following Is Not Considered to Be a Major