- Types:
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B cell, B lymphocyte
a lymphocyte derived from bone marrow that provides humoral immunity; it recognizes free antigen molecules in solution and matures into plasma cells that secrete immunoglobulin (antibodies) that inactivate the antigens
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T cell, T lymphocyte
a small lymphocyte developed in the thymus; it orchestrates the immune system's response to infected or malignant cells
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lymphoblast
an immature lymphocyte
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plasma cell, plasmacyte
a cell that develops from a B lymphocyte in reaction to a specific antigen; found in bone marrow and sometimes in the blood
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CD4 T cell, CD4 cell, helper T cell, helper cell
T cell with CD4 receptor that recognizes antigens on the surface of a virus-infected cell and secretes lymphokines that stimulate B cells and killer T cells; helper T cells are infected and killed by the AIDS virus
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CD8 T cell, CD8 cell, cytotoxic T cell, killer T cell, killer cell
T cell with CD8 receptor that recognizes antigens on the surface of a virus-infected cell and binds to the infected cell and kill it
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plasmablast
the precursor of a plasma cell
