Macroscopical and microscopical studies of the common bile duct in reindeer (Rangifer tarandus tarandus L)

• Published in: Rangifer
• Main Authors: Timo Rahko, Sven Nikander
• Format: Article in Journal/Newspaper
• Language: English
• Published: Septentrio Academic Publishing 1990
• Subjects: anatomy; histology; ductus pancreaticus; globule leucocyte; mast cell; reindeer; Animal culture; SF1-1100; Paksu; Rangifer; Rangifer tarandus
• Online Access: https://doi.org/10.7557/2.10.1.784; https://doaj.org/article/558aa53b150548e4b570ba712306c6fb

The histological structure and secretory function of the common bile duct (ductus hepaticus communis) has not been previously described in reindeer. Macroscopical studies were thus performed in 25 reindeer to reveal the morphology and topography of the ductus hepaticus communis and adjoining organs. Histologic structure of the common bile duct was investigated in 20 animals. Our studies showed that the ductus hepaticus communis and pancreaticus join about 2 cm before the duodenal opening to form the common duct. The common bile duct is an elastic tube about 3 to 5 cm long and 2 to 3 mm thick partly surrounded by fat and pancreatic tissues. The wall of the duct, being about 1 mm thick by light microscopy, consisted of folded mucosa surrounded by connective tissue fibres and a serosal layer. Distally, also muscular bands were seen. In some areas separate leucocytes and even lymphatic nodules were present. Surprisingly pancreatic acini occurred in certain areas of the wall, even in close contact to subepithelial tissues. Mucosal epithelium consisted of surface and glandular epithelial cells with mucous secretion. Numerous intraepithelial globule leucocytes were identifiable within the lamina epithelialis. Tutkimus yhteisen sappikäytävän rakenteesta porolla. Abstract in Finnish / Yhteenveto: Yhteisen sappikäytävän (ductus hepaticus communis) histologista rakennetta ja eritystoimintaa ei ole aikaisemmin kuvattu porolla. Makroskooppisia tutkimuksia suoritettiin 25 porolla yhteisen sappikäytävän rakenteen ja topografian selvittämiseksi. Seinämän histologinen rakenne selvitettiin 20 porolla. Tutkimukset osoittivat, että porolla ductus hepaticus communis ja ductus pancreaticus yhtyvät noin 2 cm ennen ohutsuolta muodostaakseen yhteisen tiehyeen. Ductus hepaticus communis on noin 3-5 cm pitkä ja 2-3 mm:n läpimittainen käytävä. Se on elastinen ja osit-tain rasva- ja haimakudoksen ympäröimä. Seinämä on mikroskooppisesti noin 1 mm paksu. Sisäosan muodostaa poimuuntunut limakalvo. Limakalvoa ympäröivät sidekudossäikeet ja ...