Gastrulation is a process common to nearly all metazoan organisms during which an embryo with distinct tissue layers develops out of a seemingly unstructured assembly of cells referred to as ...

an extra-embryonic cell layer that produces the nutrient-providing yolk sac and the embryonic layer that will give rise to the embryo itself and the amniotic sac that protects the developing embryo.

Researchers have answered a long-standing question in developmental biology by revealing the driving forces of the massive cell movements that occur during early embryonic development ...