The Cardiovascular System

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Across
  1. 2. Heart beat
  2. 3. Largest artery
  3. 4. One of two upper chambers of the heart
  4. 5. Inadequate oxygen in tissues
  5. 8. Listening to sounds within the body
  6. 10. Temporarily closes an opening so that blood flows in only one direction
  7. 12. Double-layered membrane surrounding the heart.
  8. 13. Muscular middle layer of the heart.
  9. 14. Improper closure of the heart valves
  10. 15. Small vein.
Down
  1. 1. Trainedin opening veins for phlebotomy
  2. 3. Smaller branches of arteries
  3. 6. Smallest type of blood vessel
  4. 7. An extreme form of hypoxia
  5. 9. Bluish discoloration of the skin
  6. 11. Inner lining of the heart.