What is gastrulation?

  • (noun): The process in which a gastrula develops from a blastula by the inward migration of cells.


Gastrulation is a phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a trilaminar ("three-layered") structure known as the gastrula. These three germ layers are known as the ectoderm, mesoderm, and endoderm.

Read more about Gastrulation.

Some articles on gastrulation:

Primitive Streak
... of the primitive streak will establish bilateral symmetry, determine the site of gastrulation and initiate germ layer formation ... place where cells will ingress and migrate during the process of gastrulation and germ layer formation ... axis, becoming the first symmetry-breaking event in the embryo, and marks the beginning of gastrulation ...
Neural Development In Humans - Embryonic Stage - Neurulation
... It follows gastrulation in all vertebrates ... During gastrulation cells migrate to the interior of embryo, forming three germ layers— the endoderm (the deepest layer), mesoderm and ectoderm (the ... After gastrulation the notochord—a flexible, rod-shaped body that runs along the back of the embryo—has been formed from the mesoderm ...
Formation of The Archenteron in Sea Urchins
... See Gastrulation ... At this point gastrulation is complete, and the gastrula has a functional digestive tube ... During Gastrulation, the Archenteron develops into the digestive tube, with the blastopore developing into either the mouth (Protostome) or the anus (Deuter ...
Bilaminar Blastocyst - Epiblast Cells During Gastrulation
... development and the formation of the primitive streak sparks the beginning of gastrulation ... Gastrulation is when the three germ cell layers develop as well as an organism’s body plan ... During gastrulation, cells of the epiblast, a layer of the bilaminar blastocyst, migrate towards the primitive streak, enter it, and then move apart ...