Coloured SEM of T-lymphocyte killer cell attacking

Coloured SEM of T-lymphocyte killer cell attacking

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Credit: BSIP, SECCHI LECAQUE/SCIENCE PHOTO LIBRARY

Caption: Killer T-lymphocyte attacking a cell. Coloured Scanning Electron Micrograph (SEM) of a T- lymphocyte killer cell attacking a larger cell. Three small rounded killer T-lymphocyte cells, a type of white blood cell, are seen at right. One of these smaller cells (near centre) has attached itself to a large undifferentiated cell (at right) and is attacking it. It recognises the larger cell (which may be a virus infected cell or a cancer cell) by its surface antigens. Once it attaches it will kill the cell, so acting as an important mechanism in the body's immune response. Magnification: unknown.

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Keywords: anatomy, attacking, cells, human body, immune, killer, killer t-lymphocyte, lymphocyte, phagocytosis, t, t-lymphocyte, white blood cell

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