CARDIOVASCULAR SYSTEM

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Across
  1. 1. specialized nervous tissue in the right atrium that begins at the heartbeat.
  2. 5. smallest typeof blood vessel.
  3. 6. largest artery in the body.
  4. 8. largest blood vessels that carry blood away from the heart
  5. 10. beat of the heart as felt through the walls of the arteries.
  6. 12. double layered membrane surrounding the heart
  7. 13. instrument used to measure blood pressure.
  8. 14. largest vein in the body
  9. 15. abnormal swishing sound caused by improper heart valve closure.
Down
  1. 2. muscular middle layer of the heart.
  2. 3. artery artery carrying oxygen-poor blood from the heart to the lungs
  3. 4. relaxation phase of heartbeat.
  4. 7. contraction phase of the heartbeat.
  5. 9. one of the two lower chambers of the heart.
  6. 11. record of the electrical activity of the heart.