Final answer:
The cerebral hemispheres control the opposite side of the body and are connected by the corpus callosum.
Step-by-step explanation:
The cerebral hemispheres are the two halves of the cerebrum, which is the largest part of the brain. Each hemisphere controls the opposite side of the body. For example, the left hemisphere controls the right side of the body and vice versa. This is possible due to the corpus callosum, which connects the two hemispheres and facilitates communication between them.