A collaboration of researchers from Japan, Spain and the U.S. offers a phylogenetic and ontogenetic overview of the primitive streak and its role in mediating amniote (vertebrate animals that develop on land) gastrulation, and discuss the implications of embryonic stem cell-based models of early mammalian embryogenesis on the function of this structure.
Click here for original story, Building a human body through gastrulation
Source: Phys.org