DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Blood monocyte and phagocytosis of a dying red blood cell, scanning electron micrograph (SEM). Monocytes are derived from bone marrow monoblasts and promonocytes. A monocyte is a circulating phagocyte that ingests microbes, invading particles, cellular debris and dying red blood cells. They are delivered to the blood and can enter the tissues to develop into macrophages. Magnification: x2,000 when shortest axis printed at 25 millimetres.
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