Form 2 Respiration

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Across
  1. 1. water containing dissolved oxygen is drawn into the fish and passes over its _____.
  2. 4. ________ respiration needs oxygen for it to occur.
  3. 7. when you ________ your ribcage moves up and out.
  4. 8. older tadpoles and adults use their ______ and lungs.
  5. 10. all ________ exchange takes place in the lungs.
  6. 11. during the process of inhalation your ______ flattens.
  7. 12. the amount of oxygen needed to break down acid is called _______ debt.
Down
  1. 2. ________ acid is a poisonous chemical created by anaerobic respiration.
  2. 3. the _______ system is very important since it provides the body with oxygen.
  3. 5. amphibians such as toads and frogs have _______ respiratory surfaces.
  4. 6. plants use ______ energy than animals.
  5. 9. when you ________ your ribcage drops.