Troianchuk O. Morphological peculiarities of esophagus, stomach and dodecadactylon of hens grown under radioactive pollution

Thesis dedicates researching morphofunctional peculiarities of esophagus, dewlap glandular, muscular sections and duodenum of hens in postnatal period of ontogenesis, grown in conditionally clean and polluted with radionuclides territories.The results of radiological researches showed the highest specific activity of Cs-137 in digestion organs of researched animals in muscular and glandular sections of stomach, the lowest - in duodenum.According to organometric researches, hens in postnatal period of ontogenesis of researched group in relation to controlled one, a decrease of absolute and relative mass and linear soundings of esophagus, dewlap, glandular, muscular sections and duodenum is observed.Effects of low-intensity radiation on the body laying evident desquamation of the epithelium of the glands and the final extension of the lumen of ducts, swelling and loosening loose connective tissue submucosa esophagus. In the mucosa of dewlap - smoothing boundaries between epithelial cells and epithelial plate loosening muscle plate. In the glandular part of the stomach partial desquamation of epithelial mucosal edema and muscle plate. In the muscle of the stomach loosening muscular membranes. In duodenal wall - reduction in villus height, epithelial desquamation their plates, indicating the development of compensatory-adaptive reactions in animals on the cumulative effect of radionuclides.The results obtained at the tissue and organ levels complement the current understanding of the morphological changes of animals to the action of radiation, the degree of expression of which depends on the length of their stay in the contaminated area.