Surface Ultrastructure of Ultimobranchial Remnants in the Thyroid Gland of Buffalo (Bos bubalis)
Identifieur interne : 000E74 ( Main/Merge ); précédent : 000E73; suivant : 000E75Surface Ultrastructure of Ultimobranchial Remnants in the Thyroid Gland of Buffalo (Bos bubalis)
Auteurs : R. Sayed ; K. H. Aly ; W. Mubarak [Égypte]Source :
- Anatomia, Histologia, Embryologia [ 0340-2096 ] ; 2005-12.
Abstract
The remnant of ultimobranchial (UB) body in the thyroid gland of adult buffalo was studied. This remnant appeared in the form of irregular and elongated follicles of various size and shape with folded lumen. These structures occupied a peripheral location beneath the capsule, as well as being embedded mostly in the vascular connective tissue of the thyroid. Calcitonin cells were predominantly localized in the UB follicles. Scanning electron microscopy revealed that surface of most UB follicular cells was almost flat and polyhedral or hexagonal in shape. Other follicles possessed cells with dome shaped apical surface demarcated by a shallow intercellular depression. The luminal surface of the follicular cell lining was studded with microvilli that appeared with various density and length and were numerous at the cellular borders. Interestingly, most of UB follicular cells were provided with single cilium, projecting over the cell surface. Notably some UB follicles presented various stages of apocrine activities.
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DOI: 10.1111/j.1439-0264.2005.00669_102.x
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