Across
- 1. tachy-
- 7. record of electrical changes in the heart
- 10. artery in the upper arm
- 11. upper heart chambers
- 13. contraction
- 14. Has the thickest walls of the 4 chambers of the heart
- 15. oxygen-poor blood from the lower part of the body enters the heart from the ____
Down
- 2. node pacemaker of the heart
- 3. blood enters the heart through the
- 4. the middle muscle layer of the heart
- 5. relaxation
- 6. newly oxygenated blood enters the ____ from the lungs.
- 8. valve flaps
- 9. abnormal swishing through the heart valves
- 12. lower tip of the heart
- 13. some people think Tom Brady is brady-