Across
- 2. main artery
- 3. shape of the heart
- 4. size of the heart
- 5. allow the blood to only flow in one direction
- 8. provides oxygen to the circulatory system
- 9. is a muscular organ that pumps blood throughout the body
Down
- 1. carry blood away from the heart oxygen rich
- 3. connect arteries and veins together
- 6. carry blood back to the heart
- 7. main cause of a heart attack