1. Blastula definition in English dictionary, blastula meaning, synonyms, see also 'Blastular',blastulation',blast',blastema'

2. Blastocoel is the cavity formed during blastulation. It is a fluid-filled cavity during the early stages of development

3. Blastocoel can be seen inside the blastula, and it is formed during the blastulation when the early embryo becomes the blastula