stomodeum
英
美
网络 口凹; 原始口腔; 囊胚层缩起形成原口; 原口; 口管
双语例句
- In the course of development, the invagination of stomodeum occurs earlier than that of proctodeum at the third and the sixth nauplius stages respectively.
在发育过程中，口凹是在第三期无节幼虫时内陷形成，而原肛是在第六期无节幼虫时内陷形成的，所以口凹的发生早于原肛的发生。 - The putative PGCs with Cf-vasa expression form in gastrula stage, and are located symmetrically at both sides of the stomodeum in trochophore. These cells subsequently migrate to the posterior pole of D-shaped larva and then migrate towards abdomen.
表达Cf-vasa的原生殖细胞形成于原肠胚时期，在担轮幼虫中对称分布于口凹两侧，并随幼虫发育迁移至D型幼虫末端后，继续沿边缘向腹面迁移。