Respiratory System Keyword Crossword

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Across
  1. 2. Moving air out of the lungs
  2. 4. Smaller tubes that split from the bronchi
  3. 6. Blood which contains lots of oxygen
  4. 8. Tube that carries air in and out of the lungs
  5. 9. Sacks that fill with air when we breathe in and out
  6. 10. Tiny air sacks in the lungs
Down
  1. 1. Burning oxygen and glucose in cells to get energy
  2. 3. Blood which has had a lot of the oxygen used up
  3. 5. Taking air into the lungs
  4. 7. The two tubes that split from the trachea to each lung