Japanese Journal of Veterinary Research;Volume 12, Number 4

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FINE STRUCTURE OF POST-CAPILLARY VENULES IN MOUSE LYMPH NODES

SUGIMURA, Makoto;FURUHATA, Kitao;KUDO, Norio;TAKAHATA, Kurahiko;MIFUNE, Yoshikatsu

Permalink : http://hdl.handle.net/2115/1799
JaLCDOI : 10.14943/jjvr.12.4.83

Abstract

The post-capillary venules of mouse lymph nodes were examined with optical and electron microscopes. The endothelial cells of these venules contain many mitochondria, well developed, rough-surfaced endoplasmic reticula, numerous free ribosomes, a prominent Golgi complex and three types of inclusions ; multivesicular bodies and dense inclusion bodies with and without a cuboid crystal. The prominent Golgi complex and the inclusion with a cuboid crystal are not present in the endothelial cells of other blood vessels in the lymph nodes of mice. The endothelium of the venules is surrounded by pericytes which correspond to ROUCET's cells which are usually only observed in arterial capillaries. All of cells migrating through the post-capillary venules are small lymphocytes and no other leucocytes are normally present. The small lymphocytes migrate by penetrating the junction between the endothelial cells but not by penetrating their cytoplasm. One degenearted cell (lymphocytes?) was observed between the endothelial cells of the venules.

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