| A | B |
|---|
| oxygen | what burning things need |
| carbon dioxide | what burning things produce |
| red | color of blood that carries oxygen |
| almost black | color of blood that carries carbon dioxide |
| arteries | carry blood away from the heart |
| veins | carry blood back to the heart |
| bronchial tubes | part of the respiratory system |
| trapezius | part of the muscular system |
| esophagus | part of the digestive system |
| femur | part of the skeletal system |
| conclusive | means that something is true without a doubt |
| conclude | means to end or figure out |
| conclusion | means the end |
| digestion | the act of digesting |
| digest | to change food into fuel for the body |
| spinal cord | connects the brain to all parts of the body |
| nerves | wires that carry messages |
| brain | organ that lets you think and feel |
| indent | what you do the first line of every paragraph |
| modify | means to change |
