Puzzles assignment part 1

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Across
  1. 3. like membrane surrounding the heart.
  2. 4. of two upper chambers of the heart.
  3. 7. phase of the heartbeat.
  4. 9. of the heart as felt through the walls of the arteries.
  5. 11. lining of the heart.
  6. 12. to measure blood pressure.
  7. 13. lining of blood vessels.
  8. 15. layer of the heart.
  9. 16. artery.
Down
  1. 1. artery in the body.
  2. 2. between the right atrium and the ventricle.
  3. 5. that is oxygen poor.
  4. 6. of the heart.
  5. 8. carrying oxygen poor blood from the heart to the lungs.
  6. 10. phase of the heart.
  7. 14. blood vessel.