Cell-mediated immune response

Cell-mediated immune response

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Credit: RUSSELL KIGHTLEY/SCIENCE PHOTO LIBRARY

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Caption: 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 and bottom). The cytotoxic cells release chemicals that cause the macrophages to disintegrate and die, killing the viruses inside as well.

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

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