The human brain, like the brain of all vertebrates, is made up of three main parts called the forebrain, midbrain, and hindbrain.

The human brain is the command center of the human nervous system. The brain receives incoming messages from the body's sensory organs and sends outgoing messages to the muscles. The basic structure of the human brain is similar to that of other mammals, but the ratio of brain size to total body size in humans is larger than in all mammals.