Morphology of the venous system of kidneys in dogs in the postnatal period of ontogenesis

The article presents data on the dynamics of morphometric parameters of the diameter of the caudal vena cava and renal veins of dogs in the postnatal period of ontogenesis, the peculiarities of the course and branching of extra- and intraorganic venous vessels of the kidneys of dogs, as well as the formation of the right and left renal veins in the gates of the organ. The increase in the diameter of the caudal vena cava and renal veins of dogs in the postnatal period of ontogenesis is uneven. An intense increase in the diameter of the caudal vena cava in dogs was detected at 3 months. and seven years. The diameter of the renal veins increases rapidly by 3 months. the age of the animals. In most cases, the intraorgan renal veins of the dogs on the right and left form one trunk of the efferent renal vein. The formation of the right renal vein in the gates of the organ occurs in three ways: two, three and four trunks, and the left renal vein by the fusion of two interlobar veins. The double trunk of the right renal vein is rarely recorded. The data obtained in the course of morphological study on the venous system of the kidneys of dogs can be used for operative access to organs.