The lateral mesoderm is divided into two distinct layers by the formation of the
Extraembryonic coelom
Intraembryonic coelom
Cardiogenic region
Notochord
The lateral mesoderm is a subdivision of intraembryonic mesoderm and initially is a solid plate of mesoderm. The intraembryonic coelom forms in the middle of the lateral mesoderm, thereby dividing it into the intraembryonic somatic mesoderm and intraembryonic visceral mesoderm.
General Embryology 2