Around the 14th day of embryonic development, a key stage in human growth called gastrulation kicks off. Cells begin to organize into layers that form the early buds of organs. The primitive streak—a ...

In fact, even the most experienced researchers have a hard time saying whether an embryo in its gastrulation stage – one of ...

variations of which can also be found to occur during later stages of embryogenesis in many organisms. The study of gastrulation, therefore, not only attracts researchers interested in ...