pronephros

The development of the kidney , the major excretory organ after birth , consists of3 stages : the pronephros , mesonephros and metanephros .

肾脏是人体主要的排泄器官，它的发育经过原肾、中肾、后肾3个阶段。

At E_ ( 12-16 ) ( Which means embryo development at 12 ~ 16 day after copulation ), the embryo shows the vestige of pronephros pending the formation of the embryonic axis .

E12～16d（意指胚胎发育到12～16d），在胚中轴形成期显示出原肾遗迹。

An ultrastructural observation of immune cells in pronephros of grass carp , Ctenopharyngodon idellus

草鱼头肾免疫细胞超微结构的观察

The goat embryo re-acted the process of the system evolution , which passed through pronephros , mesonephros and metanephros .

海门山羊胚胎泌尿器官的发生，重演了系统的进化过程，从前肾、中肾到后肾。