F/col SEM of macrophages

F/col SEM of macrophages

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Credit: MANFRED KAGE/SCIENCE PHOTO LIBRARY

Caption: Scanning electron micrograph of numerous macrophages from an unidentified source. Macrophages are large scavenger cells which form part of the body's defence system. Their most important function is the engulfment and digestion of invading bacteria, viruses, protozoans, and of cells and cell debris resulting from inflammation or damage. Once engulfed, material is enclosed within vacuoles called lysosomes, where it is broken down by hydrolytic enzymes. Macrophages also function in the initial immune response by processing foreign antigens & displaying them for attention from other white cell types. Magnification: x600 at 6x7cm size.

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Keywords: anatomy, cells, defence, from tumour, human body, immune, immunology, in macrophage, lysosome, macrophage, system

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