| A | B |
| Breathing | The movement of air into and out of the lungs. |
| Aerobic Respiration | The process of breaking down glucose in the presence of oxygen. |
| Diaphragm | Sheet of muscle that helps move air into and out of the lungs. |
| Alveoli | Tiny sacs where the exchange of oxygen with the blood occurs. |
| Windpipe | Trachea |
| Trachea | Cartiliage ringed tube that connects mouth to bronchi |
| Inhale | The volume of the chest cavity increases, air pressure decreases. |
| Exhale | Volume of chest cavity decreases, air pressure increases. |
| Respiratory Infection | Infection of any organ of the repiratory system. |
| Bronchitis | Irritation and swelling of the bronchial tubes. |
| Emphysema | Disease of the alveoli. |
| Asthma | An allergic reaction that causes the bronchial tubes to contract. |
| Lung Cancer | Uncontrolled cell growth in the lungs |