DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
Apoptosis. Coloured scanning electron micrograph (SEM) of human white blood cells (leucocytes), showing one cell undergoing apoptosis. Apoptosis is the process of "genetically programmed cell death". At top, an apoptotic cell has changed shape and its cytoplasm has developed blebs (grape-like clusters). A normal white blood cell is seen below it. These white blood cells are myeloid leucocytes, originating from bone marrow. If cells of the human myeloid cell line are deprived of growth factors, they undergo the process of apoptosis. Research on apoptosis may provide genetic treatments for diseases such as cancer. Magnification: x2,600 at 5x7cm size.
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