science crossword puzzle

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Across
  1. 2. The first segment of this organ is the duodenum
  2. 3. Where urine is stored.
  3. 4. They inflate so the frog can breathe.
  4. 6. The female reproductive organ in frogs.
  5. 9. Filters blood and make urine, has a bean named after it.
  6. 10. Where excrements are stored before they move to the cloaca.
  7. 11. Carries oxygenated blood AWAY from the heart.
  8. 13. Stores bile for the liver.
  9. 14. Carries deoxygenated blood TOWARDS the heart.
  10. 16. The upper chamber of the heart.
  11. 17. How they breathe.
  12. 19. Removes bad blood cells and replaces them.
Down
  1. 1. The teeth in the frog's mouth.
  2. 5. It protects the eyes while swimming.
  3. 7. How frogs hear.
  4. 8. The lower chamber of the heart.
  5. 12. Where all excrements exit body.
  6. 15. Holds the small intestine.
  7. 18. Where chemical digestion starts, after the esophagus.
  8. 20. Looks like a net, manages blood sugars.