When does the nervous system begin to form?

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.

Processes above and be sure to mention the movement of electrons and energy as the carbon atom moves from one reaction to another.

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.