early animal embryonic development that produces the blastula. In mammalian development, the blastula develops into the blastocyst with a differentiated...

The morula develops into a structure called a blastula through a process called blastulation. The blastula develops into a structure called a gastrula through...

stage in the early embryonic development of most animals, during which the blastula (a single-layered hollow sphere of cells), or in mammals the blastocyst...

yolk-filled cavity that forms in the blastula during very early embryonic development. At this stage in mammals the blastula is called the blastocyst, which...

occurs during the blastula stage of embryonic development in non-mammals. During this stage, the embryo is referred to as a blastula. The series of changes...

folding of an area of the exterior sheet of cells towards the inside of the blastula. In each organism, the complexity will be different depending on the number...

embryo, it continues dividing into a hollow sphere of cells, which is a blastula. These outer cells form a single epithelial layer, the blastoderm, that...

holoblastic or meroblastic depending on the species. During gastrulation, the blastula develops in one of two ways that divide the whole animal kingdom into two-halves...

move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development. Animals form a clade, meaning that they...

to create a cavity called a blastocoel. The structure is then termed a blastula, or a blastocyst in mammals. The mammalian blastocyst hatches before implantating...