棘头梅童鱼消化道形态与组织学结构特征

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为了解棘头梅童鱼消化道形态结构特点,采用解剖及石蜡切片技术对其进行研究.结果显示,棘头梅童鱼的消化道由口咽腔(舌)、食道、胃、幽门盲囊和肠组成.舌由基舌骨突出外覆黏膜而成,黏膜上皮为复层扁平上皮,内含少量味蕾及黏液细胞.食道、胃、幽门盲囊及肠均可分为黏膜层、黏膜下层、肌层及浆膜层.食道粗短,黏膜层被覆复层扁平上皮,内含大量黏液细胞.胃呈卜型,且具有体积较大的胃盲囊.胃上皮为单层柱状上皮,上皮之下的固有膜内分布有大量胃腺.幽门盲囊位于胃与前肠连接处,呈指状,有12~17根,其组织学结构与肠道相似.肠呈“S”型盘曲,肠指数为0.72±0.10,黏膜层被覆单层柱状上皮,其间分布有少量杯状细胞.棘头梅童鱼消化道各部形态及组织学结构特征与其食性相适应.
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