Chapter 11 Cardiovascular System

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Across
  1. 8. Record of the electrical activity of the heart
  2. 9. Thin-walled vessel that carries blood from body tissues and lungs back to the heart.
  3. 13. One of two lower chambers of the heart.
  4. 14. Blood that is oxygen-poor.
  5. 15. Innermost lining of blood vessels.
Down
  1. 1. Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle.
  2. 2. Small vein.
  3. 3. Abnormal swishing sound caused by improper closure of the heart valves
  4. 4. Largest vein in the body
  5. 5. Gas that enters the blood through the lungs and travels to the heart to be pumped
  6. 6. Valve between the left atrium and the left ventricle; bicuspid valve.
  7. 7. Muscular middle layer of the heart.
  8. 10. Double-layered membrane surrounding the heart.
  9. 11. Relaxation phase of the heartbeat.
  10. 12. Inner lining of the heart.
  11. 13. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction.
  12. 16. Located between the right atrium and the right ventricle