Karahan S, Yildiz D, Bolat D
Department of Histology and Embryology, Faculty of Veterinary Medicine, Kirikkale University, 71451 Campus, Kirikkale, Turkey.
Acta Vet Hung. 2007 Dec;55(4):417-24. doi: 10.1556/AVet.55.2007.4.1.
This article describes the scanning electron microscopic (SEM) features of the ovine interdigital sinus. The lumen was filled with a dense secretory material and quite a number of hairs embedded in the luminal content. For SEM purposes, the sinus was divided into three parts: base, body and neck. At the cut surface, the wall exhibited significant folds which were almost absent in the base, the very short blind end of the sinus. The wall had three layers: epidermis, dermis and fibrous capsule. Stratified epithelium with a prominent keratin layer faced the lumen. The inner surface was similar to the skin surface; however, it was coarser due to folds. The fibrous capsule was composed mainly of dense connective tissue, constituting the outermost layer of the wall. The dermis contained common skin structures including sebaceous glands, hair follicles, arrector pili muscles and apocrine glands. Sebaceous glands appeared as groups of bubbles if they were not collapsed. Apocrine glands generally appeared as a group of coiled tubules. They frequently exhibited apocrine blebs, which is a feature of apocrine secretion. SEM was able to locate some secretory vesicles in the lumen of apocrine tubules which is frequently filled by secretory content. Thus, the apocrine tubules exhibited classical features of apocrine secretion.
本文描述了绵羊指间窦的扫描电子显微镜（SEM）特征。管腔内充满致密的分泌物质，并嵌入许多毛发于腔内物质中。为进行扫描电子显微镜观察，将窦分为三部分：底部、体部和颈部。在切面处，窦壁呈现明显褶皱，而在窦的极短盲端底部几乎没有褶皱。窦壁有三层：表皮、真皮和纤维囊。有明显角质层的复层上皮面向管腔。内表面与皮肤表面相似；然而，由于褶皱而更粗糙。纤维囊主要由致密结缔组织组成，构成窦壁的最外层。真皮包含常见的皮肤结构，包括皮脂腺、毛囊、立毛肌和顶泌汗腺。皮脂腺若未塌陷则呈气泡群状。顶泌汗腺通常呈一组盘绕的小管。它们经常出现顶泌小泡，这是顶泌分泌的一个特征。扫描电子显微镜能够在顶泌小管腔内定位一些分泌小泡，顶泌小管腔内常充满分泌物质。因此，顶泌小管呈现顶泌分泌的典型特征。
