Cerebrum is the largest part of the brain, consisting of two hemispheres the left and right Hemisphere separated from each other by the longitudinal fissure in the midline, , the corpus callosum and the fibers that connect them.
The cerebrum does not include the medulla, pons, and cerebellum. It contains the motor cortex.
Each hemisphere has an outer layer of grey matter, the cerebral cortex, below which lies white matter containing the basal ganglia. Nerves of the cortex are arranged on the outside surfaces as grey matter.
The corpus collosum is a massive bundle of nerve fibers that connect the two hemispheres - at the bottom of the longitudinal fissure.
Moreover, the Cerebrum which is also known as the Cortex is the largest and most highly developed part of the brain.
This is the "learning" part of the brain, and the seat of all intelligent behaviour. It is responsible for the initiation and coordination of all voluntary activity in the body and for governing the functioning of lower parts of the nervous system.