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28.7 MB (9.1 MB compressed)
2980 x 3367 pixels
25.1 x 28.4 cm ⏐ 9.9 x 11.2 in (300dpi)
LENNART NILSSON / BOEHRINGER INGELHEIM / TT / SCIENCE PHOTO LIBRARY LENNART NILSSON / BOEHRINGER INGELHEIM / TT / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of a macrophage white blood cell trying to engulfing a stone flake that is considerably larger than the cell. This process is called phagocytosis. Macrophages are cells of the body's immune system. They phagocytose (engulf) and destroy pathogens, dead cells and cellular debris.
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