high endothelial venule

initialism: HEV
https://doi.org/10.1351/goldbook.13212
Specialized venule in lymphoid tissues that has walls permeable to migrating lymphocytes, allowing them to move from blood into the lymphoid tissues.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1175 [Terms] [Paper]