Question

Is blastoderm formation followed by gastrulation?

Answer 1

Blastoderm:

1. Blastoderm is a single layer of embryonic epithelial tissue that makes up the blastula.
2. The process in which the single-layer cells would differentiate and transform into a complex and multilayered embryo.
3. The ball of cells is referred to as a blastula, once it cleavages produces around 100 cells.
4. The blastoderm undergoes more cycles and turns into the most complex form.

Gastrulation:

1. The blastula undergoes transition and forms gastrula and this process is called gastrulation.
2. Gastrulation follows the blastoderm formation and the tip of the blastoderm begins the formation of ectoderm, mesoderm, and endoderm.
3. Gastrulation is the stage of early embryonic development in most animals.
4. It takes place after the cleavage and formation of the blastula.
5. Gastrulation is followed by organogenesis when the individual develops organs in the newly formed germ layers.
6. Each germ layer will develop specific tissue and organs in the embryo.
7. Thus gastrulation takes place after the formation of the blastoderm.

Figure showing blastula: