During the embryonal stage, the cells along the back of the spinal cord and brain differentiate into __________ systems, while the cells along the front become the __________ systems.

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The Answer of During the embryonal stage, the cells along the back of the spinal cord and brain differentiate into __________ systems, while the cells along the front become the __________ systems.

During the Embryonal Stage, the Cells Along the Back of the Spinal