What is metastasis? or Where are T-cells and B-cells formed? How do they differ from each other?
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precursors originate in the bone marrow. The pre-B cells stay in the bone marrow to undergo further development, while the T cell precursors migrate to an immune organ located in the neck (the thymus) to further develop.
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Cancer metastasis is the spread of cancer cells to tissues and organs beyond where the .... cells, and endothelial cells from different organ sites show different degrees of permeability
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