During the gastrula stage, structures are shaped through morphogenetic movement of tissue (mesoderm), injuring and disorganizing the invaded tissue architecture, which in turn promotes consequent proliferation and differentiation.
These phenomena resemble the morphogenetic movement of embryo development, as it follows similar tissue invasive mechanisms through cellular movement and is tailored upon a mesenchymal matrix of mesodermic derived cells ["fluid mesoderm" according to Mechtnikoff (1893)].
Regarding the mechanisms underlying this coordination, the regulation of cellular processes such as the cell cycle, cell division, and morphogenetic movement of multicellular bodies must be studied together with cell differentiation.
Gastrulation is the first major morphogenetic movement during embryogenesis for forming the digestive tube.
Here we discuss recently obtained knowledge about the cellular events associated with formation of the notochord, namely cell division control, morphogenetic movement, and vacuole formation.
After cleavage and gastrulation, a large lobe (the preoral lobe) forms at the anterior end, and the embryo undergoes extensive morphogenetic movements to set up the vitellaria body plan.
The anterior and posterior regions undergo morphogenetic movements that distort the bilateral symmetry and transform the patterning of the ciliary bands.
During gastrulation, the massive and precisely orchestrated movements of the cells which shape the embryo are called morphogenetic movements (from the Greek words morphi and genesis), he explained.
Their work also sheds light on the mechanical integration of individual morphogenetic movements, ie, how one movement is coupled to others giving rise to the three dimensional architecture of the embryo.
They complete the symposium by reviewing recent work on simulation of gastrulation and cell cycles as well as on the morphogenetic movements
of the dorsally located 40-cell notochord.