АNALYSIS OF THE STRUCTURE OF THE INTRAHEPATIC BILE DUCTS OF MAMMALS WITH A MIXED TYPE OF NUTRITION

Diseases of the biliary system, such as cholecystitis of various etiologies, gallstone disease, post-cholecystectomy syndrome and cholangitis, are becoming more common. Every tenth representative of adult population suffers from gallstone disease. This disease is widespread in various countries of the world, and the number of patients is increasing. An increase in the incidence of the biliary system has been noted in all economically developed countries, and women with this pathology are a several times more common case than men. The wall of the intrahepatic bile duct is represented by outer adventitia and inner mucosa. In the initial sections of the excretory system of the liver, bile ducts in the mucous membrane are represented by epithelial tissue with a basement membrane, which ensures the physiological regeneration of this layer. The middle section of the biliary system of the liver is almost no different from the structure in the initial sections. There are still some differences in the structure of the inner shell. Other forms of epitheliocytes are observed. Not only cubic, but also prismatic epitheliocytes are found in intrahepatic bile ducts. The nuclei, which are mainly located near the basal surface, have some differences in the location. But there are also those in which the nucleus is located in the center of the cell. The department of the intrahepatic bile duct, which is the closest to the gate of the liver, has differences in diameter and in the number of cells of the inner lining. Epitheliocytes have a prismatic structure, and the nuclei are mainlylocated on the basal surface and have an elongated shape. The outer shell, in which there are cells of the fibroblastic series and an intercellular substance with collagen fibers and an amorphous substance, remains unchanged.