False-colour TEM of macrophage engulfing bacteria

False-colour TEM of macrophage engulfing bacteria

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Credit: CNRI/SCIENCE PHOTO LIBRARY

Caption: Phagocytosis of bacteria. False-colour transmiss- ion electron micrograph (TEM) of a macrophage which has engulfed (phagocytosed) a large number of bacteria. Bacteria being digested appear as the numerous orange & green ovoid bodies inside the macrophage. Macrophages are scavenger cells which attack bacteria & other microbes. They are concentrated at various sites, notably the lung, liver, spleen & lymph nodes. Pseudopods extend around the microbe & engulf it in a vacuole, the phagosome, prior to its exposure to microbicides released from granules inside the cell. Magnification: x1400 at 6x7cm size.

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Keywords: anatomy, bacteria, cells, defence, false-coloured, human body, immune, immunology, in macrophage, phagocytosis, system

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