The dynamics of tissue components of the myocardium in the lambs of lactic period of ontogenesis

The aim of the study was to determine the dynamics of tissue myocardial components in the lambs of lactation period of ontogenesis. To achieve the goal, the following objectives were set: to determine the dynamics of micrometric components of internal architectonics heart in lambs; to establish the features of histological heart structure in lambs. The morphology of the heart of qigai breed of lambs of 1, 2, 3 months of age was examined using the complex of morphological techniques. Relative area of tissue components in the preserium and ventricles of the heart: loose fibrous connective tissue and blood vessels of the microcirculatory channel, conducting and working cardimiocytes, and also to find out their growth dynamics-index core elongation was estimated. It was found out that in monthly lambs in the myocardium of the interventricular septum, transverse striation manifested itself more, than in the myocardium of the ventricles and atrium, and relative cardiomyocytes area was the greatest in the left ventricle. In 3-month-old lambs, transverse striation was to the greatest extent. With age, the largest number of cardiomyocytes remains in the left ventricle, and the relative area of loose fibrous connective tissue and blood vessels of the microcirculatory bed, the index of core elongation change unevenly. In the right and left atria, in 90-days of age animals, relative area of loose fibrous connective tissue decreases, in the ventricles on the contrary increases.