35.2 MB (11.5 MB compressed)
4300 x 2864 pixels
36.3 x 24.1 cm ⏐ 14.3 x 9.5 in (300dpi)
CMEABG-UCBL1, ISM / SCIENCE PHOTO LIBRARY CMEABG-UCBL1, ISM / SCIENCE PHOTO LIBRARY
Monocyte. Coloured transmission electron micrograph (TEM) of a monocyte cell (centre). Monocytes are a type of white blood cell (leucocyte), part of the body's immune system, that are found in the circulating blood. The kidney-shaped nucleus (orange) is a typical feature of these cells. Monocytes protect against blood-borne pathogens by phagocytosing (engulfing) them and then presenting the digested parts on their cell surfaces. This presentation allows other immune system cells, such as T cells, to recognise the pathogens so that they can be killed quickly. Magnification: x7125 when printed at 10 centimetres wide.
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