And as soon as the germ layers are formed, they can begin producing the different types of structures, organs and systems found within that human adult organism. Now, the first type of system that is produced during embryological development is the nervous system. And the process says by which the ectoderm germ layer forms. The nervous system is known as neuralization. And this will be the focus of this lecture. Now, neuralization takes place as soon as gastrolation takes place.