crossword puzzle

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Across
  1. 2. - connect bone
  2. 3. - body system
  3. 4. - part of DNA
  4. 6. - finger bone
  5. 8. - type of fat
  6. 9. - hearing organ
  7. 11. - heart valve
  8. 15. - Eye part
  9. 16. - brain fluid
  10. 17. - chew with it
  11. 18. - knee ligament
Down
  1. 1. - bone in arm
  2. 3. - blood cell
  3. 5. - breating muscle
  4. 7. - joint type
  5. 8. - upper limb
  6. 9. - tooth layer
  7. 10. - smell sensor
  8. 12. - air pipe in neck
  9. 13. - type of cell
  10. 14. - stomach aid
  11. 19. - holds neurons