Наукові журнали та збірники видань
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Документ The structure and topography of lymphoid tissue in immune formations of intestines in ducks(ВЦ НУБіП України, 2019) Mazurkevych T.A.; Khomych V.T.The aim of the study was to determine the structure and topography of lymphoid tissue in immune formations of the intestines (Peyer’s patches, Meckel’s diverticulum, apical diverticula) in the postnatal period of ducks’ ontogenesis. Established that lymphoid tissue in these organs located in the tunica mucosa and tunica muscularis of the intestines’ wall. From the one-day age of duck, the lymphoid tissue is found in the tunica mucosa of all studied structures and in the tunica muscularis of the apical diverticula, and in the tunica muscularis from 10–20-days of age in the location of Peyer’s patches and the Meckel’s diverticulum. Lymphoid tissue has three levels of structural organization. These are diffuse lymphoid tissue, primary lymphoid nodules and secondary lymphoid nodules. The presence of all levels of the structural organization of lymphoid tissue indicates its complete morphofunctional maturity. The complete morphofunctional maturity of the mucosal lymphoid tissue of Peyer's patches is reached on the 15 day of ducks’ age, the mucosal lymphoid tissue of the Meckel diverticulum on the 20-day of age, and in the apical diverticula on the 10- day of age. The complete morphofunctional maturity of the muscular lymphoid tissue of Peyer's patches is reached on the 15–25 days of ducks’ age, the muscular lymphoid tissue of the Meckel diverticulum on the 25-day of age, and in the apical diverticula on the 10-day of age. The present article provides the first time data summarizing the structure and topography of lymphoid tissue in the immune formations of the intestines, such as Peyer’s patches, Meckel’s diverticulum and apical diverticula of the Blahovarsky cross broiler ducks.Документ Features of the thymic morphology in hens and ducks(ВЦ НУБіП України, 2018) Dyshlyuk N.V.; Parkhomenko A.V.The features of the thymic morphology in hens and ducks were studied. Samples were obtained from 3 adult birds of each species. They were studied by light microscopy using classical methods of morphological research. The tissue samples were fixed in 10% neutral buffered formalin and embedded in paraffin block and finally the sections were cut at 5-10 μm thickness using sliding microtome and stained with hematoxylin and eosin, according to Van Gizon and Weigert and impregnated with silver nitrate according to Kelemen. It was established that the thymus of birds was represented by isolated cervical parts, which, in the form of strands, were located under the skin on the lateral surfaces of the neck, along the trachea, along the course of the neurovascular bundle, and consisted of individual lobes. In hens 5 to 8 lobes were included in each thymus and extended from the 3-cervical vertebra to the start of the thoraco-abdominal cavity. Thymus of ducks consisted of 3-4 lobes and was located in the posterior third of the neck. Its cranial end was at the level of 10-11 cervical vertebrae, and caudal end reached 12 cervical vertebra. Individual lobes of duck’s thymus had a greater absolute mass than the lobes of hen’s thymus. They were also more separated from each other. Lobes of hen’s and duck’s thymus had a variety of shapes. Among them, there were mainly oval, convex-oval, beanshaped, rounded, flat and, sometimes, sickle-shaped. Morphofunctional units of the thymus were lobules, which consisted of a cortex and a medulla. In birds the medulla occupied a larger area than the cortex. In the medulla, there were Hassall’s corpuscles, that were better developed in ducks.