week 10

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Across
  1. 4. One of two lower chambers of the heart.
  2. 5. One of two upper chambers of the heart.
  3. 8. Beat of the heart as felt through the walls of the arteries
  4. 9. Small artery
  5. 10. Record of the electrical activity of the heart
  6. 14. Double-layered membrane surrounding the heart
  7. 15. Instrument to measure blood pressure
Down
  1. 1. Smallest type of blood vessel.
  2. 2. Relaxation phase of the heartbeat.
  3. 3. Contraction phase of the heartbeat.
  4. 4. Small vein
  5. 6. Muscular middle layer of the heart.
  6. 7. Abnormal swishing sound caused by improper closure of the heart valves
  7. 11. Smallest type of blood vessel
  8. 12. Gas that enters the blood through the lungs and travels to the heart
  9. 13. Thin-walled vessel that carries blood from body tissues and lungs back to the heart