| A | B |
|---|
| adrenaline | a hormone that gives the body extra enery in times of excitement |
| axons | fibers on neurons that carry messages away from the cell |
| cerebellum | the part of the brain that controls balance and muscles |
| cerebrum | the part of the brain that controls voluntary movements and thinking |
| dendrites | the fibers on neurons that carry messages into the cell |
| endocrine glands | organs that produce hormones that are released into the bloodstream |
| hormones | the chemical messengers in the body that are produced by the endocrine glands |
| medulla | the part of the brain that controls automatic body functions like breathing |
| neurons | nerve cells throughout the body that carry signals to and from the brain |
| reflex | an automatic and involuntary response to an outside stimulus |
| spinal cord | a rope of neurons that connect the brain to the rest of the nervous system |
| synapses | the spaces between neurons |
