N any of a series of paired linear pouches in chordate embryos, arising as outgrowths of the wall of the pharynx. In fish and some amphibians they become the gill slits 鳃囊
The forms and structures of gill pouch in five Lampetra japonicas were observed in detail.
本文对五条日本七鳃鳗腮囊的形态结构进行了比较详细的观察。
The results indicate that there are seven pairs of gill pouches in Lampetra japonica (Martens). The wall of gill pouch folding inward forms gill-lobes and secondary gill lobe.
其结果表明：日本七鳃鳗的腮囊有七对，囊壁向内折叠形成腮叶及次级腮叶。
The morphological changes of embryo of Hyriopsis cumingii in its nurturing pouch of outer gill were examined.
对三角帆蚌胚胎在其外鳃育儿囊内的形态变化进行了显微观察。
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