科研之友
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摘要
The present study was aimed at the macroanatomical and histological investigation and the demonstration of the structural characteristics of the uropygial gland in the white stork. The uropygial gland of two adult male white storks constituted the material of the study. It was determined that the gland was situated subcutaneously in between the caudal aspect of the lumbosacral bone and the first coccygeal vertebrae. The gland was composed of two lobes, which displayed an oval appearance when viewed from above and resembled a water drop when observed medially. Tuft of feathers were present on the caudal margin of each lobe. The present study revealed that the uropygial gland of the white stork is a simple tubular gland, which discharges its secretion into the lumen by a holocrine mode. Each lobe, possessed centrally located large cavities and a main excretory duct and displayed the presence of externally situated %26quot;peripheral tubules%26quot; and interiorly situated %26quot;central tubules%26quot;. These secretory tubules, which composed the parenchyma, were separated by connective tissue septa referred to as %26quot;trabeculae%26quot;, and released their secretion into a centrally located lumen. The wall of the secretory tubules was comprised of four layers, referred to as the germinative, intermediary, secretory and degenerative layers. The silver-staining procedure demonstrated that the stroma of the uropygial gland did not contain reticulum fibres. The anatomy and histology of the gland has been examined in few avian species. Up to date, this study is the first to describe the histological and anatomical peculiarities of the uropygial gland in white stork. The results acquired hereby will surely contribute to further studies to be conducted on the related area. El estudio tuvo como objetivo la investigaci車n anat車mica e histol車gica de la gl芍ndula uropigial de la cig邦e a blanca, junto con demostrar las caracter赤sticas estructurales de ella. El material del estudio estuvo constituido por gl芍ndula uropigial de dos cig邦e as blancas adultas macho. Se determin車 que la gl芍ndula se encuentra v赤a subcut芍nea entre la parte caudal del hueso lumbosacro y las primeras v谷rtebras cocc赤geas. La gl芍ndula se compone de dos l車bulos que muestran un aspecto ovalado, vista desde arriba y se asemejan a una gota de agua cuando se observa en sentido medial. Un penacho de plumas estaba presente en el margen caudal de cada l車bulo. El presente estudio revel車 que la gl芍ndula uropigial de la cig邦e a blanca es una gl芍ndula tubular simple, que descarga su secreci車n al lumen de un modo holocrino. Cada l車bulo posee una gr
