this may be of interest as well: Morphogenetic tissue movement and the establishment of body plan https://pubmed.ncbi.nlm.nih.gov/11385630/ https://pubmed.ncb

this may be of interest as well: Morphogenetic tissue movement and the establishment of body plan https://pubmed.ncbi.nlm.nih.gov/11385630/ https://pubmed.ncbi.nlm.nih.gov/11385630/ invagination, involution, ingression, delamination, & epiboly: https://yt.artemislena.eu/watch?v=-cJZn-HcqcY https://yt.artemislena.eu/watch?v=-cJZn-HcqcY [video] in general terms, a cell has to know what it will be first, then, it will also be able to "deduce" where it should be.