double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
gastrula的用法和样例:
例句
用作名词 (n.)
The resulting gastrula consists of an outer ectoderm, an inner endoderm, and a mesoderm layer positioned between them. 最终原肠胚由一个外肠胚,内肠胚,和一个中肠胚构成。