53.6 MB (7.1 MB compressed)
4843 x 3865 pixels
40.9 x 32.8 cm ⏐ 16.1 x 12.9 in (300dpi)
PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY
Monocyte. Coloured Scanning Electron Micrograph (SEM) of a monocyte (macrophage) in a blood capillary of the "zona reticularis" of the adrenal gland. The monocyte (yellow) is the largest type of white blood cell. Here it is passing through a porous capillary (violet) which has a red blood cell and blood platelets (yellow globules). Pro- truberances on the surface of the monocyte help it to move. The monocyte migrates into tissues to scavenge and engulf cellular debris and foreign micro-organisms. Monocytes thus play an important role in the initial phase of the body's immune response. Magnification: x6,000 at 6x7cm size.
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