【摘要】 应用石蜡连续切片技术对兴义维蚋成熟幼虫(具鳃斑)消化道的组织学结构进行研究。其消化道由前肠、中肠和后肠等3部分组成。前肠分为咽、食道和前胃,口内侧上方内陷形成一对形状不规则的上唇腺,咽前段存在骨化食窦,食道内陷形成套管样前胃。中肠以4个大型胃盲囊为起点,根据肠壁细胞形态差异分为3个区域。后肠由幽门、回肠和直肠组成,回肠与直肠结构差异明显。4条马氏管从中肠与后肠的分界处分出。纺织腺形态特异。更多还原

【Abstract】 The histology of alimentary canal of Simulium(Wilhelmia) xingyiense mature larva(with gill spots) was investigated by using paraffin serial section.The alimentary canal is composed of foregut,midgut and hindgut.The foregut includes pharynx,esophagus and proventriculus.The up-inside of buccal cavity invaginates to form the labral gland with irregular shape.Ossified cibarium exist in anterior pharynx.Canular proventriculus forms by the invagination of esophagus.The midgut begins with four big gastric caeca,and divides into three regions according to the epithelium cell shape.The hindgut consists of pylorus,ileum and rectal.The structure of the ileum is different from rectal.Four malpighian tubules diverge from the boundary between midgut and hindgut.The structure of silk duct is special.更多还原