Cleavage and Blastulation | Development of human Embryo |

The development of multi-cellular organisms (human embryo) begins from a single-celled zygote, which undergoes rapid cell division to form the blastula. The rapid, multiple rounds of cell division are termed cleavage. After the cleavage has produced over 100 cells, the embryo is called a blastula. #EmbryonicDevelopment