Cardiovascular System

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Across
  1. 4. deoxygenated blood from body to lungs
  2. 7. between left atrium and left ventricle
  3. 10. middle layer of the heart
  4. 13. whoosing or swishing sound.
  5. 14. prevent backflow of blood
  6. 15. deoxygenated blood travels through here
  7. 16. What pumps blood to all parts of the body
Down
  1. 1. contraction of heart
  2. 2. closing of pulmonary and aortic valves
  3. 3. oxygenated blood from lungs to body
  4. 5. relaxation of heart
  5. 6. inner later of heart
  6. 8. closing of two atrioventricular valves
  7. 9. outside layer of heart
  8. 11. oxygenated blood travels through here
  9. 12. between right and left atrium