Tissue Structure and Ultrastructural Characterization of the Gills of Acrossocheilus yunnanensis
[Objective]This study investigated the tissue structure and ultrastructural characteristics of the gills of A.yunnanensis,providing data for enriching the biological basis of A.yunnanensis.[Method]This study analyzed the microstructure and ultrastructure of the gill tissue and cells of A.yun-nanensis using electron microscopy techniques such as transmission and scanning.[Result]The results showed that the gills of A.yunnanensis had four pairs of complete gill slice,and each gill slice was mainly composed of three parts:gill filaments,gill arches and gill rakers.The surface cells of the gill filaments of A.yunnanensis were relatively rich and diverse,mainly including mucous cells,pavement cells and mitochondrial rich cells.Among these cells,pavement cells were the most abundant cells on the gill sur-face,and their surface morphology and structure were also the most abundant,mainly presenting star point rod-shaped,circulars micro-ridged and short ridge.The gill arches and gill rakers of A.yunnanen-sis had two main cell types on their surfaces,mainly pavement cells with circulars micro-ridged and cup-shaped mucous cells.[Conclusion]The present study found that the basic structure of the gills of A.yun-nanensis was similar to that of other bony fishes,and the structural characteristics of the gills of A.yunna-nensis were closely related to their gas exchange and ion regulation in their habitat.
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