| A | B |
| neurons | a network of cell that send messages to the brain |
| axons | long branch of a neuron |
| dendrite | short branch of a neuron |
| synapse | connects one neuron to another |
| motor nerves | carry messages from the brain to the body |
| sensory nerves | carry messages from the body to the brain |
| medulla | brain stem that controls breathing, heartbeat and blood pressure |
| cerebellum | back part of the brain makes sure your body parts work together and helps your body keep it's balance |
| cerebum | largest part of the brain that controls your actions and lets you think, learn,and have feelings |
| spinal cord | nerves inside your backbone that sends electrical messages to your brain and other parts of your body |