Answer:
There you go! they explained it better than I could. hopefully that helps you, for more information you could simply look up an article.
Answer:
more than one.............
The human nervous system starts to form very early in the embryo’s development. At the end of the gastrulation phase, an elongated structure, the notochord, is laid down. The embryo thereby changes from a circular organization to an axial one—a critical step in the development of its nervous system.
Water freezes
the rock breaks
Answer:
(d) release is controlled by nervous system