Coops

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Across
  1. 2. responsible for transporting oxygen and nutrients throughout the body.
  2. 4. of muscle that makes up the heart.
  3. 7. of taking air into the lungs.
  4. 8. that connects the throat to the lungs.
  5. 12. air sacs in the lungs where oxygen and carbon dioxide are exchanged.
  6. 13. Key
  7. 14. dioxide
Down
  1. 1. bone in the chest that protects the heart and lungs.
  2. 2. blood vessels in the circulatory system.
  3. 3. that protects the brain.
  4. 4. of joint found in your shoulder and hip.
  5. 5. in red blood cells that carries oxygen.
  6. 6. pumping organ of the circulatory system.
  7. 9. of chambers in the human heart.
  8. 10. where gas exchange occurs in the respiratory system.
  9. 11. exhaled by the respiratory system.