What is the difference betweent the cns and the peripheral nervous system?

The simple answer is that the cns center is located in the brain and spinal cord, protected by bone structures, while the pns is is broken down into two parts, the somatic nervous system, and the autonomic nervous system. It is located in nerves that connect to the nerves of the cns and is not protected by your bones. Pns is what controls your breathing, heart beat, and movement, while also directly communicating with the cns. The cns is responsible for things like perception and processing of sensory stimuli. This is just the very surface of your complex question, but I hope it helps.