biology respitory and cirrcultory system

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Across
  1. 4. any of the major air passages of the lungs
  2. 6. main artery that carrys blood
  3. 7. any of the fine branching blood vessels that form a network
  4. 12. transport deoxygenated blood from the right side of the heart to the lungs for oxygenation
  5. 13. thin membrane that lines the inside of the heart and blood vessels.
  6. 15. a large membranous tube
Down
  1. 1. large, dome-shaped muscle that contracts rhythmically
  2. 2. relating to the heart and blood vessels.
  3. 3. infection of the lungs
  4. 5. breathe out
  5. 8. a partition separating two chambers
  6. 9. distribute oxygen-rich blood to your body
  7. 10. blood vessels that carry oxygen-rich blood from your lungs to your heart.
  8. 11. membranous structures, especially in the heart
  9. 14. the hollow muscular organ forming an air passage to the lungs