This image may not be used in educational posters Cell-mediated immune response, computer artwork. This type of immune response is most often used aga

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This image may not be used in educational posters Cell-mediated immune response, computer artwork. This type of immune response is most often used against intracellular pathogens, such as viruses. The viruses (gold) are phagocytosed (engulfed) by macrophage cells (green), a type of white blood cell. Fragments of viral protein (antigen) are displayed on the macrophage's surface. The antigen is recognised by a helper T lymphocyte (purple, centre and right), which secretes chemicals to activate other immune cells, including cytotoxic T lymphocytes (purple, left). The cytotoxic cells release chemicals that cause the macrophages to disintegrate and die, killing the viruses inside as well.

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Size: 5500px × 4237px
Photo credit: © RUSSELL KIGHTLEY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: anatomy, artwork, biological, biology, blood, body, cell, cell-mediated, cells, cellular, computer, cytotoxic, defence, helper, human, illustration, immune, immunology, infection, killing, lymphocyte, macrophage, macrophages, pathogen, phagocytosing, response, system, virus, viruses, white