苏氏鲢鲶鳃超微结构观察

对苏氏鲢鲶鳃结构进行扫描和透射电镜观察.鲢鲶鳃丝末端膨大呈杓状结构,每一鳃丝两侧具许多呈褶状的鳃小片,相邻两鳃丝上的鳃小片紧密镶嵌排列.鳃弓和鳃耙表面分布众多味蕾.鳃丝呼吸面上皮细胞薄,高度血管化,形成呼吸面隆起;非呼吸面由微脊细胞彼此相连,间缝具分泌细胞开口.鳃小片由单层或数层外上皮细胞和由基膜相隔的柱状细胞及其围在血管腔的凸缘构成,氯细胞多分布在鳃小片基部,并有开口通外.还探讨了鲢鲶鳃丝和鳃小片特殊的结构与功能.

Observation on the fine structure of the gill in Pangasius sutchi

The fine structure of the gill in Pangasius sutchi has been investigated using transmission and scanning electron microscopy. The terminal of gill filament of Pangasius sutchi expands to be spoon shaped. Many secondary gill lamellae arrange on two sides of each filament, and inlay each other. There are many taste buds distributing on the surface of gill arches and gill rakers. The respiratory surface of gill filament is rough and highly full of bloodvessels; the non respiratory surface of gill filament is composed of tetragonal or hexagonal epithelial cells, which form various patterns. There are many holes among the circular ridgy patterns. The basic structure of the secondary lamellae consists of one or two outer epithelial layers, an intermediate basement membrane layer internal to which are the pillar cells and their flanges which line the blood channels. The chloride cells are frequently found in the base regions of the secondary lamellae and are overlain by a single epithelial layer, they often seemed to be open at the surface between adjacent epithelial cells. The relationships between the special structure of fish gills and their function are discussed.