PR. J. BERNARD / CNRI / SCIENCE PHOTO LIBRARY PR. J. BERNARD / CNRI / SCIENCE PHOTO LIBRARY
Monocyte blood cell, light micrograph. 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. Here, the cell nucleus has the characteristic notched or kidney-shaped appearance. The surrounding cells are red blood cells.
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