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.
The Middle Colonies were more diverse than colonies in New England and the South. Most of the early settlers depended on the fur trade and on farming for economic survival. The most populous of the Middle colonies was Pennsylvania, other colonies were settled rather haphazardly over the course of the 17th century. Settlers usually organized themselves in small farms spread throughout the colony with a few cities added to the mix.