SECCHI-LECAQUE / ROUSSEL-UCLAF / CNRI / SCIENCE PHOTO LIBRARY SECCHI-LECAQUE / ROUSSEL-UCLAF / CNRI / SCIENCE PHOTO LIBRARY
Monocyte white blood cell, transmission electron micrograph (TEM). Monocytes are a type of white blood cell, part of the body's immune system. Monocytes are the largest white blood cell. They engulf and digest invading bacteria and cell debris. The monocyte's cell nucleus (black) is at left. Magnification: x5400 at 35mm.
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