Try some of the following links for information:
Sraposted by SraJMcGin
What level are you discussing? At the micro level, you could be talking about neurons, synapses, glial cells, arteries, veins. At the macro level, you might discuss the cerebral cortex, Broca's area, hippocampus, hypothalamus, cerebellum, etc.
Each have important functions.posted by PsyDAG