what is fast gastrula
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Answer:
what is fast gastrula Gastrula, early multicellular embryo, composed of two or more germinal layers of cells from which the various organs later derive. The gastrula develops from the hollow, single-layered ball of cells called a blastula which itself is the product of the repeated cell division, or cleavage, of a fertilized egg. This cleavage is followed by a period of development in which the most significant events are movements of cells relative to one another.
Answer:
During early animal development, most embryos develop into a blastula or hollow ball of cells. Then the embryos form a gastrula by a process called gastrulation. During gastrulation, some of the outer embryonic cells get pushed inward during a process called invagination. This creates many structures, including germ layers. We'll come back to what germ layers are a little bit later. Right now, let's look at the process of gastrulation and the structures it forms.