Central nervous system - Structure. 1  The central nervous system consists of the two major structures: the brain and spinal cord. 2  Microscopically, there are differences between the neurons and tissue of the central nervous system and the peripheral nervous system. [citation needed]
They produced flour from the wheat they grew and sold it in other colonies or to Europe. These colonies were part agriculture and part industrial. Factories in Maryland produced iron and paper, textiles were produced in Pennsylvania factories. Lumber and shipbuilding industries also had success her.
Agricultural production was the economic engine of the American South, with crops such as cotton, indigo, rice and tobacco generating fortunes for plantation owners. There is a dark side to this important chapter of American history: The bulk of the arduous labor done on plantations was performed by slaves.