puzzle

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Across
  1. 3. gaurds of tricuspid and bicuspid opening
  2. 7. Electrical device that converts one form of energy into another
  3. 8. act of flowing or pouring back by the orifice of entrance
  4. 10. catching, spotting,detectingsleuthing
  5. 12. Help in air exchange
  6. 13. Not every person have these
  7. 15. Ear,Sound
  8. 16. moderate
  9. 17. motion
  10. 18. It can be heard
  11. 19. instant
Down
  1. 1. At the end of year students gives
  2. 2. old-fashioned, out of date
  3. 4. No of heart beats per second
  4. 5. Heart
  5. 6. Relating to the stomach and intestines
  6. 9. Heart sound
  7. 10. Austrian physicist famous for his discovery of the effect (1803-1853)
  8. 11. Where doctor sits
  9. 14. instrument for auscultation