1 The central cavity of the gastrula, which ultimately becomes the intestinal or digestive cavity.

2 The results showed:At gastrula stage, the cells in front of the embryonic area gradually cleave to form optic disc rudiment.

3 Due to the shortage of trustworthy evidence of gastrula and hatching, their phylogenetic affinity remains a problem of long controversy.

4 The ratios of fused oocytes developed to gastrula and hatching stages, however,[] were not so different with the control group.

5 However, the embryos at gastrula or heart beating stage were very sensitive to UV irradiation, showing just damage effect, which was very strong even at very low amount of the UV irradiation.

6 However , content of the dissolvable protein and amino acid during gastrula stage during blastula stage.

7 The results showed that, the digestive canal initiated from the gastrocoele, which was formed by invagination at gastrula stage.

8 Embryology The splitting of the blastoderm into two layers of cells to form a gastrula.

9 The subcultural 4-10 generational cells as donors were transferred into unfertilized eggs with nuclei from common carp and golden carp as receptors, finally, the embryo developed to gastrula stage.

10 Yin, Z. J. , Zhu, M. Y. , 2010. Epibolic gastrula embryo fossils from the Ediacaran Weng'an Biota (Guizhou, Southwest China).

11 Cell junctions of the presumptive ectoderm cells of early gastrula of Cynops orientalis were studied with freeze-etching method and ultrathin sectioning.