Cardiovascular crossword puzzle

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Across
  1. 5. Smallest blood vessel. Materials pass to and from the bloodstream through the thin capillary walls.
  2. 6. Partition or wall dividing a cavity; such as between the right and left atria and right and left ventricles.
  3. 7. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells.
  4. 10. Thin-walled vessel that carries blood from body tissues and lungs back to the heart. Veins contain valves to prevent backflow of blood.
  5. 11. Small artery.
  6. 12. One of two lower chambers of the heart.
  7. 13. Inner lining of the heart.
  8. 14. Abnormal swishing sound caused by improper closure of the heart valves.
Down
  1. 1. Largest artery in the body.
  2. 2. Beat of the heart as felt through the walls of the arteries.
  3. 3. Double-layered membrane surrounding the heart.
  4. 4. Small vein.
  5. 8. Muscular, middle layer of the heart.
  6. 9. Largest type of blood vessel; carries blood away from the heart to all parts of the body.
  7. 10. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction.