False-colour scanning electron micrograph of a neutrophil,the most common type of leucocyte (white cell) in blood. Neutrophils are formed in the bone marrow and use the blood as a transport system to reach sites of infection in the tissues,where they engulf invading micro-organisms. They constitute 40 to 75 per cent of circulating leucocytes. A neutrophil has a single,highly lobulated nucleus. In the mature neutrophil there are usually five lobes connected by fine strands of nuclear material,but in immature cells the nucleus is generally less lobulated. Magnification: x4800 at 6x7cm size | |
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Crédit: | Science Photo Library / Photo Insolite Realite |
Taille de l’image : | 2744 px × 3543 px |
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