MORPHOLOGY OF RABBIT HEPATIC VEINS

This article describes the features of the topography, drainage zones and the nature of the branching of the hepatic veins in the domestic rabbit. The studies were carried out in the laboratory of the Department of Biology and Soil Science of the Orenburg State University in the period 2020-2021. To study the venous outflow from the liver, sexually mature (six to seven months old) rabbits of the Butterfly breed were used. For this purpose, corrosive preparations of the hepatic veins (n=15) were obtained. To fill the venous system, Sherwin Williams Promar 400 latex paint was used. Corrosion was carried out in a 20-25% hydrochloric acid solution for seven days. The length and diameter of the vessels, the angles of their confluence and divergence were subjected to measurements. The obtained morphometric data were statistically processed using the Microsoft Excel program. Statistical study consisted in the construction of variational series, the determination of average values, the coefficient of reliability of the difference in average values. During the study, it was found that venous drainage is carried out through four independent hepatic veins, which form according to the main type and flow into the caudal vena cava. The caudate process of the caudate lobe and the left lateral lobe have independent venous vessels. The remaining lobes have common efferent venous trunks and have intraorgan communications within the main lobes. Morphometric parameters indicate the predominant development of the middle (4.48±0.18 mm) and left (1.51±0.11 mm) hepatic veins. It was determined that the drainage of each lobe is carried out by three veins of the third order, forming a three-level system of vascularization. The mastoid and caudate processes of the caudate lobe have different blood outflow systems that are not interconnected.