SOME DEVELOPMENTAL STUDIES ON THE CYSTIC DUCT OF THE BUFFALO IN EGYPT (Bos Bubalus L.)

Document Type : Research article

Authors

Abstract

The cystic duct lies in the elongated Fassa vesicaefelleae, between the quadrate and right lobes of the liver, which is filled by connec tive tissue and the lesser omentum. The direction of the cystic duct is caudoventral in the developmental stages of the buffalo. In these stages, union occurs between the cystic and hepatic ducts at an acute angle outside the porta hepatis.
In the early prenatal stages, the wall of the cystic duct is formed of lamina epithelialis which consists of cuboidal or low columnar cells and subepithelial layer formed of lobes connective tissue. In late prenatal and postnatal stages, the wall of the cystic duct is formed of a mucosal layer, fibrous layer and tunica serosa and adventitia.
At 16 cm - 20 cm CVRL foetal stages, themucosal folds begin to app < /strong>ear. The cystic duct has no distinct muscular layer, but may have muscle cells, especially in the postnatal stages. The outer layer of the cystic duct consists of the serosa in the free p < /strong>art of the duct and advetitia in its attached part to the liver.