COMPARATIVE MORPHOLOGY OF THE SPLEEN OF BIRDS OF THE FAMILIES PHASIANIDAE AND COLUMBIDAE

• Main Authors: O. Dunaievska, L. Horalskyi, N. Kolesnik, I. Sokulskyi, I. Horalska
• Format: Article
• Language: English
• Published: Zhytomyr National Agroecological University 2020-08-01
• Series: Наукові горизонти
• Subjects: spleen; birds; pigeon; quail; chicken; columbidae; phasianidae
• Online Access: https://sciencehorizon.com.ua/en/journals/8-93-2020/porivnyalna-morfologiya-syelyezinki-ptakhiv-rodin-phasianidae-ta-columbidae

Morphological study of the phylogenetic direction allows to determine the ecological conditionality in the nature of the development of related forms and deepens their characteristics. The work aimed to study the spleen of birds of the Phasianidae family (chicken, quail) and Columbidae (pigeon). The histological preparations were stained with hematoxylin and eosin. Their morphometry was performed for establishing the features of the morphological structure of the organ. The microscopic structure of the spleen in birds of the pheasant and pigeon classes was characterized by the presence of the same components: stroma and parenchyma. The musculoskeletal system consisted of trabeculae and capsules. The pulp was divided into white and red. However, each species of bird had its own histological and morphometric features. The pulpal trabeculae were found only in chickens. The capsular trabeculae were also present in quails and pigeons. A characteristic feature of the pigeon's spleen is the association of the connecting trabeculae with the vascular ones, in which a large number of vessels were located. The lymphoid tissue of the spleen of birds was predominantly structured. However, in the pigeon's spleen, there was also unformed lymphoid tissue of varying size of various shapes. The white pulp of birds consisted of lymphoid nodules and periarterial lymphoid sheaths. Additionally, ellipsoids were found in the white pulp of the hens' spleen, and they were almost non-existent in pigeons. In pigeons, lymphoid nodules were mainly located in the subcapsular zone of the spleen and often formed conglomerated structures by merging 3–6 nodules. The musculoskeletal system is best developed in pigeons (9%). The relative area of white pulp is the largest in chickens (18.6%), red pulp – in quail (82%).In this work, we have taken the first step in elucidating the features of the morphology of the spleen of birds of different classes, for detailed analysis, our further research will focus on the study of morphophysiology of the spleen of birds in age and breed aspects