Plasma cell. Coloured transmission electron micrograph (TEM) of an active human plasma cell - a type of white blood cell that makes antibodies that attack infectious micro-organisms. The antibodies are manufactured on the surface of a membrane called rough endoplasmic reticulum. This is the finely folded network seen in the yellow area. The rough texture comes from minute protein- making bodies called ribosomes,which cover the endoplasmic reticulum. In the centre is the cell's nucleus (blue & red). In plasma cells the nuclear material is often arranged in characteristic,sometimes triangular,blocks,as in this case. Magnification x3333 at 6x4.5cm | |
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Crédit: | Science Photo Library |
Taille de l’image : | 4256 px × 4780 px |
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