24.9 MB (750.2 KB compressed)
2480 x 3508 pixels
21.1 x 29.7 cm ⏐ 8.3 x 11.7 in (300dpi)
HANS-ULRICH OSTERWALDER / SCIENCE PHOTO LIBRARY HANS-ULRICH OSTERWALDER / SCIENCE PHOTO LIBRARY
White blood cells. Artwork of three white blood cells (lymphocytes, grey) in a blood capillary. Some red blood cells (red) are also seen. One lymphocyte (centre left) is moving through the capillary wall (chemotaxis). Chemotaxis is movement of a cell due to a chemical stimulus. The stimulus may be due to regulatory proteins (cytokines), which generate the immune response.
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