摘要
应用组织切片技术 ,研究了红螯螯虾胚胎发育过程中消化系统的发生。红螯螯虾的消化系统由前肠、中肠和后肠 3部分组成 ,前肠和后肠由外胚层形成 ,而中肠源自原肠期由胚胎表面向囊胚内迁移的中内胚层细胞团。前无节幼体期前肠开始发生 ,至后无节幼体期先后形成口道、食道和胃等结构 ;中肠起始于后无节幼体期的次级卵黄锥 ,包括管状中肠和 1对囊状消化腺 -中肠腺 ;后肠端部是前无节幼体期形成的肛道 。
This paper describes the genesis of the digestive system of the redclaw crayfish, Cherax quadricarinatus .The digestive system consists of three parts:fore gut,mid gut and hind gut.The fore gut and hind gut origin from the ectoderm,and the mid gut derives from the mesendodermal cell group.The fore gut begins to form at the egg nauplius stage and is made up by stomodaeum,esophagus and stomach;the mid gut genesis at the egg metanauplius stage and contains a mid gut and a pair of hepatic rudiments;the hind gut starts at the same time as the fore gut to form the protodaeum which lies in the end of it.
基金
上海市教委基金项目
浙江省九五重点攻关项目资助
关键词
红螯螯虾
胚胎发育
消化系统
Cherax quadricarinatus
Embryonic development
Digestive system
