JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Coloured transmission electron micrograph (TEM) showing the glial limiting membrane (glia limitans) of white matter. It is formed by astrocyte processes (yellow) that separated blood capillary endothelium (red), pericyte (blue) and the surrounding connective tissue (green) from the myelinated nerve fibres (dark purple, bottom). Basal lamina is pink.
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