Stage 11 (8 hrs 15 min)
Late blastula stage
Drown by T. Iwamatsu
(Abbr. )
Stage 11 (8 hrs 15 min) Late blastula stage:
Projection of the underside of the blastoderm (central cells, about 20 m in diameter) into the yolk sphere is observed. In this stage, some blastomeres begin to cleave asynchronously and to migrate. Several (5-6) rows of periblast nuclei are visible around the blastoderm.