| A | B |
|---|
| blood | The liquid that carries oxygen throughout the body. |
| ventricle | The lower chamber of the heart. |
| heart | The muscular organ about the size of your fist. |
| atrium | The upper chamber of the heart. |
| vessels | The tubes that carry blood. |
| oxygen | A gas that our body needs and is carried in the blood. |
| circulatory | The name for the system that includes our heart and blood vessels. |
| vein | A blood vessel that brings the blood back to the heart. |
| valve | The function is to force the blood to flow through in one direction. |
| artery | A blood vessel that takes the blood away from the heart. |
