Across
- 3. this organ has four chambers and pumps blood to the body.
- 4. the largest artery in our body.
- 5. these blood vessels carry blood back to the heart.
- 6. these tiny blood vessel are thin and allow diffusion to happen.
- 8. the largest vein in our body.
Down
- 1. the bottom chambers of the heart are called the __________.
- 2. arteries, veins, and capillaries are all types of ________________.
- 7. these blood vessels carry blood away from the heart.
- 9. the heart has four __________________, which are kind of like small rooms or spaces.
- 10. the top chambers of the heart are called the____________.