Kostiukevich S V
Department of Medico-Biological Research, Central Scientific Research Laboratory, I.I. Mechnikov State Medical Academy, St. Petersburg.
Morfologiia. 2003;123(2):72-6.
The epithelium of colon mucosa of the adult cow was studied using the methods of light and electron microscopy to demonstrate the endocrine cells. Individual fluctuations of the endocrine cell content was noted as well as an increase in the total number of endocrine cells in the rectal epithelium, that was more pronounced tan in other vertebrates. Four types of endocrine cells were demonstrated: EC, L, D, D1. The variability of dimensions and shape of granules in EC-cells was found to be less tan in other vertebrate species. In some D1-cells the mucous granules were observed along with endocrine ones, thus indicating the presence of "mixed" exo-endocrine cells. Undifferentiated endocrine cells were also detected that were found at the bottom of the crypts. The features indicated above are the specific peculiarities of endocrine apparatus of the mucosal epithelium of cow colon.
运用光镜和电镜方法对成年母牛结肠黏膜上皮进行研究，以显示内分泌细胞。观察到内分泌细胞含量的个体波动，以及直肠上皮中内分泌细胞总数的增加，这在其他脊椎动物中更为明显。共显示出四种类型的内分泌细胞：EC、L、D、D1。发现EC细胞中颗粒的大小和形状变化比其他脊椎动物物种少。在一些D1细胞中，除了内分泌颗粒外还观察到黏液颗粒，这表明存在“混合”的外分泌-内分泌细胞。还检测到未分化的内分泌细胞，它们位于隐窝底部。上述特征是母牛结肠黏膜上皮内分泌器官的特异性特点。
