High endothelial venules

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Postcapillary venules in a lymph node: (1) macrophage , (2) lymphocytes , (3) postcapillary venules with cubic epithelium, (4) lymph vessel and lymph capillary

The term high endothelial venules ( HEV ) or postcapillary ( epithelioid ) venules , often also high endothelial venule , denotes a small venous blood vessel that can be found in lymphatic organs ( lymph nodes , Peyer's plates , tonsils ) directly next to the lymph follicles .

function

The venole allows the lymphocytes to pass ( leukodiapedesis ) from the blood to the surrounding areas. In contrast to other venules, the inner wall ( endothelium ) of an HEV is not lined with flat but with cubic (isoprismatic) cells , which therefore also have round, instead of flattened, cell nuclei .

literature

  • Ulrike Bommas-Ebert, Philipp Teubner, Rainer Voß: Short textbook anatomy and embryology. Thieme, Stuttgart 2011, ISBN 978-3-13-135533-1 , p. 18 ff.
  • Thomas Heinzeller, Carl M. Büsing: Histology, Histopathology and Cytology for an introduction. Thieme, Stuttgart 2001, ISBN 3-13-126831-X , p. 139
  • Renate Lüllmann-Rauch, Friedrich Paulsen: Pocket textbook histology. Thieme, Stuttgart 2012, ISBN 978-3-13-129244-5 , p. 327 ff.
  • Karl Zilles, Bernhard Tillmann : Anatomy. Springer, Berlin / Heidelberg 2010, ISBN 978-3-540-69481-6 .

Individual evidence

  1. ↑ Lüllmann-Rauch et al .: 2012, p. 327.
  2. ↑ Heinzeller et al .: 2001, p. 139.