Lymphatic Organs page 21

Contents

Yves Clermont, Michael Lalli, Zsuzsanna Bencsath-Makkai
LIGHT-MICROSCOPIC HISTOLOGY ATLAS

6. Lymphatic Organs

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26 27 28 29 30 31 32 33 34 35 36 37 38

6.21 Lymph node cortex

Version française

Section of the cortex of a lymph node.

This field shows a portion of the diffuse lymphatic tissue (D) which includes a longitudinal section of a post-capillary venule (V). The limits of the two extremities of this venule are indicated by broken lines. The endothelial cells (white arrows) of these vessels are thick rather than squamous as is typical for venules, so they are called high endothelial venules.

These particular venules, seen exclusively in the diffuse lymphatic tissue of the lymph node cortex, are sites of migration of lymphocytes in and out of the blood circulation. The presence of small lymphocytes between the endothelial cells of these venules is the expression of such a migration.

The elongated nucleus of a reticular cell (R) is labelled in the diffuse lymphatic tissue.

Stain: H–E
Magnification: ×650

The text and images of this Histology Atlas, by Yves Clermont, Michael Lalli & Zsuzsanna Bencsath-Makkai, are licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 2.5 Canada Licence and cannot be modified without the written permission of the authors. Use of any text or images must carry an acknowledgement which includes a link to the original work.