Respiratory System

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Across
  1. 3. Large muscle that controls the lungs.
  2. 5. One of two places where air enters your body
  3. 6. The movement of carbon dioxide and oxygen between alveoli and capillaries.
  4. 9. All animals need this gas to make food into energy.
  5. 10. Tiny sacs where gas exchange takes place.
  6. 11. scientific name for the windpipe or air tube.
Down
  1. 1. Breathe out.
  2. 2. A gas that you breathe out. It is a waste gas.
  3. 4. Breathe in.
  4. 7. What we breathe.
  5. 8. Two tubes that connect the trachea to the lungs.