Electron microscopical studies of the common bile duct in reindeer

• Published in: Rangifer
• Main Authors: Timo Rahko, Sven Nikander
• Format: Article in Journal/Newspaper
• Language: English
• Published: Septentrio Academic Publishing 1990
• Subjects: reindeer; Rangifer tarandus tarandus; anatomy; globule leucocyte; mast cell; ultrastructure; Animal culture; SF1-1100; Rangifer; Rangifer tarandus
• Online Access: https://doi.org/10.7557/2.10.1.786; https://doaj.org/article/05e1d7cb0ce3438eb7b903ce3a17001b

In a previous publication the authors have described some ultrastructural characteristics of granulated cells in the common bile duct of the reindeer. On the basis of the same material, electron microscopic observations on other tissue elements of bile duct wall are now reported. The surface and glandular epithelium were composed of tall columnar epithelial cells with villous structures on the luminal surfaces. The parietal cytoplasmic membranes of epithelial cells were equipped with intercellular desmosomes while intraepithelial globule leucocytes did not form any junctional complex with other cells. Apical cytoplasmic areas of superficial epithelial cells showed electron-dense small bodies possibly consisting of mucinous substances. The goblet and deep glandular cells, on the other hand, contained numerous large mucin granules with less electron-dense matrices. It appears that their secretions are more abundant than those in superficial epithelial cells which obviously are absorptive as their main function. The nuclei and other cytoplasmic organelles showed profiles similar to those in epithelial cells generally. The lumen of the bile ducts was usually empty or contained fine-granular or amorphous material. An unusual feature was the presence of parts of globule leucocytes or even almost whole cells occurring freely in ductal secretions. Elektronimikroskooppinen tutkimus yhteisen sappikäytävän rakenteesta porolla. Abstract in Finnish / Yhteenveto: Aikaisemmassa julkaisussa tekijät kuvasivat poron yhteisen sappikäytävän (ductus hepaticus communis) seinämän jyväsellisten solujen hienorakennetta. Tässä artikkelissa selostetaan saman aineiston perusteella (6 tervettä teurasporoa) elektronimikroskooppisia havaintoja sappikäytäväseinämän muista kudosrakenteista. Sappikäytäväseinämän pinta- ja rauhasepiteeli koostuu korkeista epiteelisoluista. Pinnallisia epiteelisoluja kattavat säännölliset mikrovillukset, ja niillä on vain vähän ilmeisesti limaa sisältäviä jyväsiä solulimassaan. Rau-has- ja pikarisoluissa ...