Gastrulation is an early stage in fetal development, occurring two weeks after conception. During gastrulation, the fetus (or blastula, to be exact), which until then had been a hollow single-layered sphere of cells, develops into a three-layered cell structure known as a gastrula. (Figure 1) Figure 1: Gastrulation. A diagram of the transformation from a [...]The post How a 300µm gastruloid can shed light on human development appeared first on Biological Industries.