This image may not be used in educational posters T cell dependent B cell activation, computer artwork. Invading pathogens (round, small) are phagocyt

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This image may not be used in educational posters T cell dependent B cell activation, computer artwork. Invading pathogens (round, small) are phagocytosed (engulfed) by macrophages, a type of white blood cell. Fragments of protein (antigen) from the pathogen are displayed on the macrophage's surface. The antigen is recognised by helper T lymphocytes (centre right), which secrete chemicals to activate other immune cells, including B lymphocytes (centre left). The B lymphocytes differentiate into plasma cells (large cells bottom right), which produce large numbers of antibodies (y-shaped) that recognise the antigen. The antibodies either neutralise the pathogen or flag it for destruction by other cells.

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Size: 5219px × 6709px
Photo credit: © RUSSELL KIGHTLEY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, activating, activation, anatomy, antibodies, antibody, artwork, biological, biology, black--white, blood, body, cell, cells, colouring, defence, dependent, human, humoral, illustration, immune, immunity, immunology, infection, lymphocyte, lymphocytes, macrophage, macrophages, mediated, monochrome, pathogen, plasma, response, system, wbc, wbcs, white