Air and The Respiratory System

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Across
  1. 3. Frogs breathe through .... on the land
  2. 5. Transport the air to and from the lungs.
  3. 7. Air is made up about 78% of ....
  4. 9. The exchange of gases in the lungs.
  5. 10. The number of times we breathe in one minute.
Down
  1. 1. Plants use .... and water for photosynthesis
  2. 2. The air enters the body through ....
  3. 4. Air is made up about 21% of ....
  4. 6. The exchange of gases on leaves.
  5. 8. Fish respiratory organ.