<human>:  What is the structure of the human brain?
<bot>: The human brain is composed of several key structures, including the cerebrum, the cerebellum, the limbic system, the brain stem, and the hypothalamus. The cerebrum, the largest part of the brain, is divided into two hemispheres and is divided into four distinct regions – the frontal lobe, the parietal lobe, the occipital lobe, and the temporal lobe. The cerebellum is responsible for coordinating movement and controlling posture. The limbic system is involved in emotion, memory, and motivation. The brain stem is responsible for basic functions such as breathing, heart rate, and swallowing. The hypothalamus helps control appetite, body temperature, and various hormone systems.