Health 2.2

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Across
  1. 3. pumps blood
  2. 6. liquid part of blood
  3. 7. muscle below lungs that help expand lungs
  4. 8. exchange of oxygen and carbon dioxide
  5. 9. carries oxygen poor blood
  6. 10. connects trachea to lung
Down
  1. 1. vessels that carry oxygen rich blood
  2. 2. stuctures that move blood around body
  3. 4. small arteries
  4. 5. system that gets O2 from outside world