Which process establishes the three definitive germ layers?
Gastrulation - three primary germ layers from epiblast during week 3 of development i.e dorsal ectoderm, middle mesoderm, ventral endoderm. Neurulation is the process by which neuroectoderm forms the neural plate, which eventually folds to form the neural tube.
Neurulation
Gastrulation
Craniocaudal folding
Lateral folding
Development period- week 1,2,3,4