DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
White blood cell. False-colour transmission electron micrograph (TEM) of a type of white blood cell known as a granulocyte. A number of cell organelles can be seen. At centre is a dumbbell- shaped nucleus (red). The green-coloured chromatin within the nucleus contains the DNA chromosomal material. The cell cytoplasm is blue. The larger yellow objects are lysosomes, which store enzymes. White blood cells with this type of multi-lobed nucleus and with lysosomes in their cytoplasm are called granulocytes. This specimen was taken from mouse bone marrow. Magnification: x6500 at 6x6cm size.
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