DON W. FAWCETT / SCIENCE PHOTO LIBRARY DON W. FAWCETT / SCIENCE PHOTO LIBRARY
Colour enhanced scanning electron micrograph of small blood vessels showing pericytes with processes encircling the vessel wall. Image A shows a pericyte of a capillary with primary processes directed longitudinally and secondary processes running circumferentially. Image B shows an arterial capillary with numerous associated pericytes. Image C shows a terminal arteriole with pericyte and circular smooth muscle cells. Magnification unknown.
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