| A | B |
|---|
| bronchioles | A network of smaller tubes that are attached to alveoli |
| lungs | Two large structures that fill with air and are emptied in a rhythmic way. |
| trachea | The windpipe that brings air into the lungs. |
| bronchi | The trachea branches into the bronchi which are the main airways that reach into each lung |
| alveoli | Thin- walled air sacs covered in capillaries. Oxygen and carbon dioxide exchange takes place in the alveoli. |
| diaphragm | A muscle that separates the chest from the abdominal cavity. This muscle is responsible for contracting and relaxing and pulling air into the lungs. |
| cilia | tiny hair-like structures that line the membranes of the nose |
| mucus | thick, sticky substance that traps foreign particles like dust, bacteria and viruses and prevents them from moving deeper into this system. |
| Pharynx | throat |
| Larynx | voice box |
| epiglottis | Flap of tissue that covers the air-only passage when we swallow preventing food and liquid from entering the lungs. (closes off the entrance to the larynx and trachea when you swallow) |
| sinusitis | inflammation of the tissues that line the sinuses |
| bronchitis | inflammation of the bronchi |
| asthma | inflammation and narrowing of the trachea, bronchi, and bronchioles causing difficulty breathing |
| pnuemonia | inflammation of the lungs due to bacterial or viral infection |
| emphysema | a disease that progressively destroys the walls of the alveoli |
