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Neurovascular unit, blood brain barrier, TEM

False-coloured transmission electron micrograph of a neurovascular unit in a mouse brain capillary. The neurovascular unit is a building block of the blood brain barrier, which is a protective layer of cells that regulates entry of molecules to the brain. A red blood cell (centre; solid orange colour) can be seen in the lumen. The lumen is lined with an endothelial cell layer (grey), which is in t…