Collagen Fiber Arrangement in Canine Hepatic Venules

Journal of Veterinary Medical Science

Tomo INOMATA¹  Kikumi OGIHARA²  Hiroyoshi NINOMIYA¹ 

[1] Departments of Laboratory Animal Science, Azabu University 1-17-71 Fuchinobe, Sagamihara, Kanagawa 229-8501, Japan;Environmental Pathology, Azabu University 1-17-71 Fuchinobe, Sagamihara, Kanagawa 229-8501, Japan

关键词: cell-maceration/SEM;    collagen fiber;    hepatic venule;    resin cast;    spiral bundle;   

DOI  :  10.1292/jvms.61.21

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(13)Cited-By(4)Cell-maceration/scanning electron microscopy, serial sections and scanning electron microscopy of vascular resin casts were employed to demonstrate the arrangement of collagen fibers in the terminal hepatic venules, involving the central, intercalated and collecting veins in dog liver. In cell-maceration specimens, each collagen fiber was observed to run in various directions, forming a sheath with a compact meshwork of collagen fibers. The collagenous meshwork in the hepatic venules was looser than those of the terminal portal venules and hepatic arterioles. Some collagen fibers formed bundles with an elongated spiral arrangement encircling the wall of the terminal hepatic venules. In resin casts, these venules were observed as a twisted configuration caused by spiral collagen bundles. A helical modification of such connective tissue bundles might provide a mechanically stable vascular structure and permit reversible changes in linear and circumferential vascular dimensions at the terminal tributaries of veins. Round or oval pores with diameters of approximately 9 μm were also observed in the sheath of collagen fibers. These pores, together with the relatively loose collagenous meshwork in the hepatic venules, might play a role in lymphocyte migration from these venules into the surrounding tissue and provide high permeability to the venule walls. No such helical configuration and pores were observed in either the portal venules or the hepatic arterioles.

【 授权许可】

Unknown