There are 3 basic parts of the brain, the cerebrum, the cerebellum, and the brain stem.   The brain is made of different types of nerve cells.It has a jelly-like consisten … cy and is about the size of a melon. The brain cells use electricity and chemicals to pass messages throughout the brain and up and down the spinal cord to the rest of the body.here are 3 basic parts of the brain, the cerebrum, the cerebellum, and the brain stem.   The brain is made of different types of nerve cells.