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Structural, ultrastructural, and functional aspects of the skin of the upper lip of silver carp (Hypophthalmichthys molitrix)
This study was carried out to analyze the architecture of the skin of the upper lip region in silver carp fishes using light, scanning, and transmission electron microscopies. The skin was composed of epidermis, dermis, and hypodermis. The epidermis of the upper lip was characterized by the presence...
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Published in: | Microscopy research and technique 2021-08, Vol.84 (8), p.1821-1833 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | This study was carried out to analyze the architecture of the skin of the upper lip region in silver carp fishes using light, scanning, and transmission electron microscopies. The skin was composed of epidermis, dermis, and hypodermis. The epidermis of the upper lip was characterized by the presence of large number of metachromatic mucous goblet cells, which showed positive reaction with Periodic Acid–Schiff (PAS), Alcian blue (AB), and toluidine blue. The electroreceptive lateral line system was organized into ampullary and tuberous organs. The scanning electron microscopy showed that the surface of the skin of upper lip was covered by microridges and characterized by the presence of taste buds and openings of lateral line system. As observed by transmission electron microscopy, the cytoplasm of the epidermal layers appeared electron‐dense except for the superficial layer, where the cytoplasm was electron‐lucent and contained many vacuoles and few profiles of rER. Moreover, the epidermis contained rodlet cells and stem cells. Few organelles were found within the cytoplasm of club cells. Neutrophils and eosinophilic granular cells were also demonstrated as important immune cells in the epidermis of the upper lip. Furthermore, lymphocytes and basophils could be identified with macrophage in the epidermal layer of the upper lip. Numerous telocytes were demonstrated between the collagen fibers of the dermis and bundles of myelinated nerve fibers. In conclusion, the skin of the upper lip region of silver carp displayed many sensory and immunological characteristic features.
The epidermis of the upper lip region of silver carp was characterized by the presence of club cells, eosinophilic granular cells, rodlet cells, and mucous goblet cells. The study showed different types of mechanoreceptive and electroreceptive lateral line system. Various important immune cells were detected in the epidermis, in addition to a network of telocytes in the thick dermis. |
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ISSN: | 1059-910X 1097-0029 |
DOI: | 10.1002/jemt.23741 |