Respiratory System

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