cardiovascular system

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Across
  1. 4. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
  2. 5. Smallest type of blood vessel.
  3. 6. Innermost lining of blood vessels.
  4. 10. One of two lower chambers of the heart.
  5. 11. Largest artery in the body.
  6. 13. Relaxation phase of the heartbeat.
  7. 14. Abnormal swishing sound caused by improper closure of the heart valves
Down
  1. 1. Beat of the heart as felt through the walls of the arteries.
  2. 2. Muscular middle layer of the heart.
  3. 3. Contraction phase of the heartbeat.
  4. 7. Inner lining of the heart.
  5. 8. Thin-walled vessel that carries blood from body tissues and lungs back to the heart.
  6. 9. Small artery.
  7. 10. Small vein.
  8. 11. One of two upper chambers of the heart.
  9. 12. Largest type of blood vessel; carries blood away from the heart to all parts of the body