Frog crossword.

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Across
  1. 3. one of the teeth that starts with m
  2. 5. deliver oxygen to the body
  3. 7. uptake of sugar
  4. 8. carries female eggs
  5. 11. upper chambers of the heart
  6. 13. first sight of chemical digestion
  7. 14. all waste is collected
  8. 16. thin membrane
  9. 17. first part of small intestine
  10. 18. carries blood to the heart
  11. 19. stores solid waste
  12. 20. stores urine
  13. 21. stores bile
Down
  1. 1. moves food out of the body
  2. 2. transparent cover
  3. 4. carries blood away from the heart
  4. 6. is one of the teeth that starts with v
  5. 9. filters blood
  6. 10. organ near the stomach
  7. 12. hearing
  8. 15. air opening to exchange gases