Cerebrum- Cerebrum or cortex is the largest part of the brain.
Cerebellum-The cerebellum, or "little brain", is similar to the cerebrum in that it has two hemispheres and has a highly folded surface or cortex. This structure is associated with regulation and coordination of movement, posture, and balance.
The cerebellum is assumed to be much older than the cerebrum
The Limbic System -often referred to as the "emotional brain", is found buried within the cerebrum. Like the cerebellum, evolutionary the structure is rather old.
Brain Stem - Underneath the limbic system is the brain stem. This structure is responsible for basic vital life functions such as breathing, heartbeat, and blood pressure.