Krause W J
Department of Pathology and Anatomical Sciences, School of Medicine, University of Missouri, Columbia, MO 65212, USA.
Anat Histol Embryol. 2010 Dec;39(6):503-8. doi: 10.1111/j.1439-0264.2010.01021.x.
Koala mandibular (submandibular) glands are compound tubuloacinar glands, the secretory units of which consist only of serous cells. Intercellular canaliculi occur between the serous cells, which are continuous with a minute lumen that courses through the centre of each secretory unit. Intercalated ducts are abundant and join striated ducts, the latter being characterized by elaborate basolateral infoldings of the plasmalemma. Secretory granules within the serous cells fail to stain with either the PAS or Alcian Blue (pH 2.5) staining procedures. Ultrastructurally, the secretory granules are membrane bound, and consist of a homogeneous electron lucent material with a fine filamentous texture. The granules tend to coalesce into irregular shaped complexes of secretory material. Discharge of secretory material into the canalicular lumen is a common observation.
考拉下颌（颌下）腺是复管泡状腺，其分泌单位仅由浆液性腺细胞组成。浆液性腺细胞之间存在细胞间小管，这些小管与穿过每个分泌单位中心的微小管腔相连。闰管丰富，并与纹状管相连，纹状管的特征是质膜在基底外侧有精细的内褶。浆液性腺细胞内的分泌颗粒在过碘酸希夫（PAS）染色或阿尔辛蓝（pH 2.5）染色程序中均不着色。在超微结构上，分泌颗粒被膜包裹，由具有精细丝状纹理的均匀电子透明物质组成。这些颗粒倾向于聚合成不规则形状的分泌物质复合物。观察到分泌物质排入小管腔是很常见的现象。
