Frans crossword

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Across
  1. 4. the heart valve at the base of the aorta and the pulmonary artery
  2. 7. where the lungs and the blood exchange oxygen and carbon dioxide
  3. 8. carrying blood away from the heart
  4. 11. a muscular organ which pumps blood
  5. 12. a passage or airway in the lower respiratory tract that conducts air into the lungs
  6. 14. carrying air in and out of your lungs
  7. 15. thickest of the heart's chambers
  8. 16. veins that transfer oxygenated blood from the lungs to the heart
  9. 18. allows your chest to expand
  10. 20. it passes the blood to the pulmonary artery
Down
  1. 1. any of the minute branches into which a bronchus divides
  2. 2. the smallest of the blood vessels
  3. 3. blood vessels that carry blood from the right side of the heart through to the capillaries of the lungs
  4. 5. largest artery in the human body
  5. 6. recieves blood low in oxygen from the body
  6. 9. surrounds the lungs and the heart
  7. 10. assisting the lungs in expanding to take in air
  8. 13. a red body fluid
  9. 17. a large vein that carries blood to the heart pumps blood
  10. 19. recieves blood from the lungs