Down
| 1. | This is the red liquid that is carried by blood vessels throughout the body. |
| 2. | These are flaps that stop blood from flowing the wrong way. |
| 3. | These are the lower chambers of the heart. |
| 4. | These are the tubes which carry blood throughout the body. (2 words) |
| 6. | These are the cells which fight disease in the body. (3 words) |
| 7. | These are the large blood vessels that carry blood away from the heart. |
| 9. | This is the organ in your body, about the size of a fist, that pumps blood throughout the body. |
| 12. | These are the upper chambers of the heart. |
| 15. | This can be taken in your wrist to count heartbeats in a minute’s time. |
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Across
| 5. | This is what makes the blood red. It carries oxygen in the blood. |
| 8. | These are large blood vessels that carry blood to the heart. |
| 10. | These are the tiny blood cells that stop bleeding. |
| 11. | This is the main and largest artery in the body. It carries blood, which has oxygen, away from the left side of the heart to every part of the body, except for the lungs. |
| 13. | These are the cells that contain hemoglobin and carry oxygen in the blood. (3 words) |
| 14. | These are proteins that are made by white blood cells. They react to something foreign in the body such as germs, bacteria, and viruses. |
| 16. | These are the tiny blood vessels that connect arteries and veins. |
| 17. | A substance that causes the body to produce antibodies. |
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