| A | B |
|---|
| septum | tissue that separates the nostrils of the nose |
| mucus | sticky substance that traps dust particles in the nose |
| cilia | tiny nose hairs that filter air going through the nose |
| pharynx | scientific name for the throat |
| larynx | scientific name for the voice box |
| trachea | scientific name for the wind pipe |
| vocal cords | tissue that vibrates in the larynx and makes sound |
| high | pitch made by tightly stretched vocal cords |
| low | pitch made by loosely stretched vocal cords |
| cartilage | rings of semi-rigid connective tissue that hold the wind pipe open |
| bronchial | tubes that lead into the right and left lungs |
| bronchiole | small bronchi |
| alveoli | sacs that exchange gases with the capillaries |
| capillary | small blood vessels that surround the alveoli |
| diffusion | passive process where molecules move from areas of high concentration to lower concentration |
| carbon dioxide | waste product exhaled by the lungs |
| oxygen | chemical absorbed by the blood in the lungs |
| diaphragm | large muscle in the chest cavity that controls the mechanics of breathing |
| lungs | spongy tissue organs that conduct breathing |
