The Respiratory System

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Across
  1. 5. Gills have a large surface what?
  2. 6. Fish use their gills to breathe here.
  3. 7. Fish absorb oxygen from the water using this body part.
Down
  1. 1. Like every animal, fish need what to survive.
  2. 2. Gills are found just behind this part of the face.
  3. 3. dioxide Fish breathe in oxygen and breathe out what?
  4. 4. Fish gills do the same job as human what?
  5. 8. There is ? oxygen in the water than in the air.