37.3 MB (13.4 MB compressed)
3100 x 4206 pixels
26.2 x 35.6 cm ⏐ 10.3 x 14.0 in (300dpi)
ISM / SCIENCE PHOTO LIBRARY ISM / SCIENCE PHOTO LIBRARY
Monocytes. Coloured transmission electron micrograph (TEM) of monocyte cells (yellow). 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 (green) 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: x6125 when printed 10 centimetres tall.
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