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Medical Definition of Pericytic venules
1. The microvasculature immediately following the capillaries, ranging in size from 10 to 50 um, and characterised by investment of pericytes; they are the site of extravasation of blood cells, are particularly sensitive to histamine, and are believed to be important in blood-interstitial fluid exchanges. Synonym: pericytic venules. (05 Mar 2000)