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Ultrastructural observations on myoepithelial cells and nerve terminals in the camel Harderian gland

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Summary

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.

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Authors and Affiliations

  1. Department of Anatomy and Histology, Faculty of Veterinary Medicine, University of Assiut, 71516, Assiut, Egypt

    Ahmed Abou-Elmagd

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  1. Ahmed Abou-Elmagd
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Abou-Elmagd, A. Ultrastructural observations on myoepithelial cells and nerve terminals in the camel Harderian gland. Anat Embryol 185, 501–507 (1992). https://doi.org/10.1007/BF00174087

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  • DOI: https://doi.org/10.1007/BF00174087

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