| A | B |
|---|
| Respiration | The process by which living organisms take in oxygen and use it to produce energy |
| Larynx | Voice box |
| Trachea | Windpipe |
| Bronchus | Tube that branches of from the trachea |
| Alveolus | Tiny grape-like sacs in the lungs where gas exchange takes place. |
| Diaphragm | Muscle at the bottom of the chest that aids in breathing |
| Vocal Cord | Tissue in the larynx that vibrates with the passage of air to form sounds |
| Lung | Main respiratory organ |
| Excretion | Process of getting rid of waste material |
| Kidney | Major excretory organ |
| Ureter | Tube that conducts urine to the urinary bladder. |
| Urinary Bladder | Sac that stores urine |
| Urethra | Tube through which urine passes out of the body |
| Nephrons | Microscopic chemical filtering factories in the kidneys |
| Urine | Liquid waste that is removed from the body |
| Urea | A chemical that the body converts ammonia into |
