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Anatomy of an Aquatic Snail

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 Anatomy of a Land Snail






Anatomy of an Aquatic Snail

  Legend
  Light yellow - body
  Brown - shell and operculum
  Green - digestive system
  Light violet - gills
  Yellow - osphradium
  Red - heart
  1. foot
  2. cerebral ganglion
  3. pneumostome
  4. upper commissura
  5. osphradium
  6. gills
  7. pleural ganglion
  8. atrium of heart
  9. visceral ganglion
  10. ventricle
  11. foot
  12. operculum
  13. brain
  14. mouth
  15. tentacle (chemosensory, 2 or 4)
  16. eye
  17. penis (everted, normally internal)
  18. esophageal nerve ring
  19. pedal ganglion
  20. lower commissura
  21. vas deferens
  22. pallial cavity / mantle cavity / respiratory cavity
  23. parietal ganglion
  24. anus
  25. hepatopancreas
  26. gonad
  27. rectum
  28. nephridium
 


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