Cns mainly contains the brain and the spinal cord.
pns contains all the nerves and the ganglia for the nerves
cns is divided into forebrain, mid brain, hind brain.
pns are divided into motor, sensory and autonomic.
cns is protected by the bone and a blood brain barrier whereas the pns is not.
cns is concerned with storing, comprehending and executing information appropriately, but the pns is more about transmission to far away structures.