The brain is divided into the brain, the cerebellum, and the brainstem, which is the highest part of the central nervous system and the main part of the brain. There are two cerebral hemispheres, which are connected by the corpus callosum of nerve fibers. The hemispheres of the brain have many curved grooves called gullies, and the bulge is called the gyrus.
The hemispheres of the brain have many curved grooves called gullies, and the bulge is called the gyrus. These grooves and gyms are like a crumpled piece of silk, and once flattened, it is about the size of a normal newspaper, about 2250 square centimeters.

Human brain (5 pieces)