出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/07/23 03:00 UTC 版)
Paracortex is the portion of a lymph node immediately surrounding the medulla. Unlike the cortex, which has mostly immature T cells, or thymocytes, the paracortex has a mixture of immature & mature T cells. Lymphocytes enter the lymph nodes through specialised high endothelial venules found in the paracortex.