| A | B |
|---|
| Pharynx | tube-like passageway for food and air |
| Alveoli | air sacs where gas exchange takes place |
| Asthma | often an allergic reaction |
| Bronchi | branches of trachea |
| Chronic Bronchitis | disease where too much mucus is produced |
| Diaphragm | muscle that moves air in and out of lungs |
| Emphysema | disease where alveoli lose ability to stretch |
| Epiglottis | flap of tissue that prevents food or liquid from entering trachea |
| Larynx | vocal cords are attached |
| Nitrogen Dioxide | air pollutant |
| Trachea | carries air into bronchi |
| Bladder | bag-shaped muscular organ that stores urine |
| Kidneys | filters blood to produce liquid waste |
| Nephrons | filtering units of kidneys |
| Ureters | tubes that lead from kidneys to bladder |
| Urethra | tube leading from bladder to outside |
| Urine | Liquid waste |
| Carbon Dioxide | Gas we exhale |
| Oxygen | Gas we inhale |
