Abou-Elmagd A
Department of Anatomy and Histology, Faculty of Veterinary Medicine, University of Assiut, Egypt.
Anat Embryol (Berl). 1992;185(5):501-7. doi: 10.1007/BF00174087.
The myoepithelial cells and the nerve terminals of the Harderian gland in the one-humped camel were examined by using the transmission electron microscope. The myoepithelial cells are well developed, and composed of a cell body containing the nucleus, and many cytoplasmic processes. The cytological features are consistent with the function of the myoepithelial cell mainly as a contractile element, and possibly as a regulator for fluid transport. They are attached to the glandular cells of the end-pieces with desmosomes and interdigitating cytoplasmic processes. Densely packed myofilaments fill most of the cytoplasm, and micropinocytosis vesicles on the inner and outer borders are prevalent. The glandular end-pieces are innervated with unmyelinated nerve terminals which have been observed in the interstitial connective tissue. Nerve terminals without neurolemmal sheath penetrating the basal lamina and forming a direct neuroglandular contact with the glandular cells were observed. These intraglandular nerve terminals were found in direct contact with the myoepithelial cells, and contained small clear vesicles and a few larger dense granules.
利用透射电子显微镜对单峰骆驼哈德腺的肌上皮细胞和神经末梢进行了检查。肌上皮细胞发育良好，由含有细胞核的细胞体和许多细胞质突起组成。细胞学特征与肌上皮细胞主要作为收缩元件以及可能作为液体运输调节剂的功能一致。它们通过桥粒和相互交错的细胞质突起附着于终末部的腺细胞。密集排列的肌丝充满大部分细胞质，内外边界上的微饮小泡很普遍。腺终末部由在间质结缔组织中观察到的无髓神经末梢支配。观察到无神经鞘的神经末梢穿透基膜并与腺细胞形成直接的神经腺接触。这些腺内神经末梢被发现与肌上皮细胞直接接触，并含有小的清亮小泡和一些较大的致密颗粒。
