Final answer:
The cerebrum is divided by the longitudinal fissure, separating it into right and left hemispheres that communicate via the corpus callosum.
Step-by-step explanation:
The cerebrum is divided by the longitudinal fissure, which is the deep groove that separates the cerebrum into two halves, creating a right and left cerebral hemisphere. The cerebrum is the largest part of the human brain and is responsible for higher brain functions, including thought, emotion, reasoning, language, and memory. To allow communication between the two hemispheres of the cerebral cortex, there exists a thick band of nerve fibers called the corpus callosum, which lies deep within the brain.