What Different-ion of cells and tissues in the embryo is controlled by?

The differentiation of cells and tissues in the embryo is primarily controlled by a combination of genetic regulation and signaling pathways. Specific genes are activated or repressed in response to various internal and external signals, guiding stem cells to develop into specialized cell types. Key signaling pathways, such as the Wnt, Notch, and Hedgehog pathways, play crucial roles in determining cell fate and organizing tissue structure during embryonic development. Additionally, the physical interactions between cells and their extracellular matrix contribute to this complex process.