50.8 MB (3.4 MB compressed)
3575 x 4967 pixels
30.2 x 42.2 cm ⏐ 11.9 x 16.6 in (300dpi)
CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
White blood cells. Coloured transmission electron micrograph (TEM) of a section through white blood cells (blue & green) or leucocytes. These protect the body against infections and fight them when they occur. They are much less numerous than red blood cells and spend a much shorter part of their lifespan in the blood itself. There are 3 main types of white blood cells; granulocytes and monocytes are responsible for destroying invading bacteria; lymphocytes stimulate the activity of the immune system and form antibodies that protect against repeat attacks of certain diseases. Magnification: x5000 at 35mm size.
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