CRITICAL PERIOD OF DEVELOPMENT OF THE EXCRETORY AND CIRCULATORY SYSTEMS BROILER CROSS "SMENA – 7" IN THE EARLY POSTNATAL MORPHOGENESIS
In the study, a comparative analysis of the critical periods in the development of the excretory and circulatory systems broiler cross "Smena-7." In the selection of age groups and critical periods of broiler cross "Smena -7" takes into account biological periods and critical phase of life that characterize the morphological, functional and metabolic changes in the body in a critical periodization Professor LP Teltsov. Based on experimentally determined data in broilers cross "Smena -7", identified biological periods in the morphogenesis of the kidneys and the heart, on the basis of completion of the adaptive response that reveals equal participation in the implementation of weight and size of the parameters. In the development of the kidneys and the heart of broiler cross "Smena -7" highlighted the productive phase, the steps related slowing of morphogenesis and the relative stability of the morphogenesis of these organs. Highlighted the critical periods in the development of the kidneys which occur in 1 day, 10 day, 20 day, and in the development of the heart - in 10 to 15 days and from 20 to 25 days.