high endothelial postcapillary venules

high en·do·the·li·al post·cap·il·lar·y ven·ules

venules in the lymph nodes, tonsils, and Peyer patches that have a high-walled endothelium through which blood lymphocytes migrate from the blood into the lymphatic parenchyma.

high en·do·the·li·al post·cap·il·lar·y ven·ules

(hī en'dō-thē'lē-ăl pōst'kap'i-lar'ē ven'yūlz)
Venules in the lymph nodes, tonsils, and Peyer patches that have a high-walled endothelium through which blood lymphocytes migrate into the lymphatic parenchyma.
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