Across
- 6. around
- 7. inside
- 9. heart
- 10. Contraction
- 11. heart rate is faster than normal
- 12. enlargement of arteries
- 14. Relaxation
- 15. leads to the contraction of the heart
- 16. Send blood out of the heart
Down
- 1. space that receives and sends blood
- 2. leads to the relaxation of the heart
- 3. narrowing of the arteries
- 4. carry blood away from the heart
- 5. flaps that act like doors; regulate blood flow
- 8. heart rate is slower than normal
- 13. Receive incoming blood