| A | B |
|---|
| The large sheet of muscle that encloses the bottom of the thorax | Diaphragm |
| The bones that protect the lungs | Ribs |
| The muscles in between the ribs | Intercostals |
| The small air sacs of the lungs | Alveoli |
| The large tube that takes air down towards the lungs | Trachea |
| Two branches of the large air tube | Bronchial tubes |
| The small air tubes inside the lungs | Bronchioles |
| The piece of cartilage that prevents food going into the lungs | Epiglottis |
| The tiny blood vessels that surround the air sacs | Capillaries |
| The action of breathing in | Inspiration |
| The action of breathing out | Expiration |
| The layer that surrounds the lungs and keeps them moist | Plural membrane |
| The volume of air breathed in and out during normal breathing | Tidal volume |
| The volume of air that remains in the lungs after maximal breathing out | Residual volume |
| Muscle respiration without oxygen | Anerobic |
| Muscle respiration with oxygen | Aerobic |
| Muscle respiration without oxygen or lactic acid production | Alactic anerobic |
