Human organs and body parts

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Across
  1. 3. it will ache if you eat too many cakes
  2. 5. not spade, club or diamond
  3. 8. impossible to send a text without it
  4. 11. protects the lungs
  5. 12. what's left if the head, arms and legs are missing
  6. 13. a word for 'yes' if you are scottish
  7. 15. a river has one and so does a tunnel.
  8. 16. humans can manage with only one
  9. 18. damaged by smoking
  10. 20. joins the two parts of your legs and has a cap
Down
  1. 1. a type of tree at the end of your wrist
  2. 2. can also be a large travelling container
  3. 3. all that's left after hundreds of years
  4. 4. fobidden to chew in school
  5. 6. this little piggy went to market
  6. 7. damaged by excess alcohol
  7. 9. we have about 8 pints
  8. 10. without them, you would fall over
  9. 14. the largest organ in the body. It covers everything.
  10. 17. hedgehogs and porcupines have lots of these; humans only have one
  11. 19. wind it in if you are causing trouble