1. Archenterons Blastopore Blastopores Gastrocoele Gastrocoeles Gastrulas Gut, Primitive Guts, Primitive Primitive Gut Primitive Guts

2. ‘With time, cells gradually become determined, so that similar cells taken from later-stage Blastulas and early gastrulas develop according to their fate at the time of transplantation.’

3. Also called blastosphere ‘With time, cells gradually become determined, so that similar cells taken from later-stage Blastulas and early gastrulas develop according to their fate at the time of transplantation.’