RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY
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White blood cells. Computer artwork of a B lymphocyte (B cell, blue) and a T lymphocyte (T cell, purple). These white blood cells are part of the immune system. B cells mature in bone marrow and are responsible for humoral immunity; they operate by recognising a specific site on the surface of a pathogen or foreign object (antigen), which they bind to before producing antibodies to destroy that antigen. T cells mature in the thymus and are involved in cell-mediated immunity, which does not rely on antibodies to fight antigens, but rather the activation of other immune cells. Interaction between B and T cells can increase B cell antibody production.
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