high endothelial postcapillary venule

high endothelial postcapillary venule

n.
Any of a group of venules located in the lymph nodes, tonsils, and aggregated lymphatic follicles, having a high-walled endothelium through which blood lymphocytes migrate into the lymphatic parenchyma.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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