Dubovij A. The histomorfological of thyroidal glands of dogs in the postnatal onthogenetic period in conditions of Zhytomyr Polissya.

Object of researching - the prolonged influence of small doses of ionizing radiation on dogs' body. Aim of researching - to find out an influence of ionizing radiation on histomorphology of a thyreoidal glands of dogs in a postnatal onthogenetics period. Methods of researching - clinical, anatomical, morphological composition of blood, biochemical, histological, morphometrical, radiological, statistical. It's proved that in first weeks of postnatal onthogenetic period the ionizing radiation causes a hypofunction of thyreoidal glands, diameter of their folliculs increases in little dogs, which were born and lives in a radioactive contaminated zone. For the first time it determined that in animals of monthage diameter of small, average and big folliculs of thyreoidal gland decreases as result of the influence of ionizing radiation comparatively with control animals. The prolonged action of small doses of ionizing radiation influences on thyreoidal glands status. It determined by its histostructure changes on dogs of 1-, 8-monthage and 1 and 3-4-years-age that is characterized by degeneration of organ as an iterfollicular craw. Branch of using: the results of scientific researching are used in educational process and scientific-researching work in Laboratory of pathomorphology of Institute of epizootology UAAS, on cafedras of anatomy and physiology of animals of South filial of National University of bioresurses and nature-using of Ukraine "Crimean agrotechnological university", veterinarian and sanitational expertise and pathological anatomy of Bila Tserkva national agrarian University, anatomy and physiology of farm animals, biotechnology of Poltava state agrarian academy. Branch of using: veterinary medicine.