Only the dorsal lip of the blastopore could induce altered development in the host .
只有胚孔的背唇能够诱导宿主发育的改变。
Dorsal lip
英语例句库
英语百科
Gastrulation
（重定向自Dorsal lip）
![](/Images/godic/202501/09/Blastula5217.png")
![Epithelial to Mesenchmyal Cell Transition – loss of cell adhesion leads to constriction and extrusion of newly mesenchymal cell.](/Images/godic/202501/09/Epithelial–mesenchymal_transition_scheme5217.png")
Gastrulation is a phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a trilaminar ("three-layered") structure known as the gastrula. These three germ layers are known as the ectoderm, mesoderm, and endoderm.