Across
- 2. smooth layer of cells lining the heart
- 4. double layer, covering the outside of heart
- 9. carry blood away from the heart
- 12. located between the left ventricle and the aorta (largest artery)
- 13. abnormal heart beats can be mild life-threatning
- 14. receives blood as it returns from the body cells
- 15. muscular wall separating the right and left side of heart
- 16. ventricular contraction
- 17. brief period of rest
Down
- 1. receives blood from left atrium and pumps it into aorta
- 3. receives oxygenated blood from lungs
- 5. transportation system of the body
- 6. receives blood from right atrium and pumps to pulmonary artery
- 7. located between left atrium and left ventricle
- 8. connect arterioles to veins
- 10. thickest layer, middle muscular layer
- 11. between the right ventricle and pulmonary artery
- 18. in between the right atrium and right ventricle