Mollusks

4,078 views

Published on

Published in: Technology, Self Improvement
  • Be the first to comment

Mollusks

  1. 1. Mollusks 3 classes: Gastropods,bivalves, and cephalopods
  2. 2. Gastropods: slugs and snails
  3. 3. Gastropods: slugs and snails
  4. 4. Gastropods: slugs and snails
  5. 5. Gastropods: slugs and snails
  6. 6. Gastropods: slugs and snails
  7. 7. Gastropods: slugs and snails
  8. 8. Bivalves: clams, 2 shelled mollusks
  9. 9. Bivalves: clams, 2 shelled mollusks
  10. 10. Bivalves: clams, 2 shelled mollusks
  11. 11. Bivalves: clams, 2 shelled mollusks
  12. 12. Bivalves: clams, 2 shelled mollusks
  13. 13. Cephalopods:Squids and octopuses
  14. 14. Cephalopods:Squids and octopuses
  15. 15. Cephalopods:Squids and octopuses
  16. 16. Cephalopods:Squids and octopuses
  17. 17. Cephalopods:Squids and octopuses
  18. 18. Cephalopods:Squids and octopuses
  19. 19. Facts:
  20. 20. Facts:1. MOST live in the ocean, SOME in fresh water and/or land
  21. 21. Facts:1. MOST live in the ocean, SOME in fresh water and/or land2. 1mm to giant squid 18m
  22. 22. Facts:1. MOST live in the ocean, SOME in fresh water and/or land2. 1mm to giant squid 18m3. Most are slow–- except squid, 40km/h and 4m out of water
  23. 23. Facts:1. MOST live in the ocean, SOME in fresh water and/or land2. 1mm to giant squid 18m3. Most are slow–- except squid, 40km/h and 4m out of water4. Bodies are alike
  24. 24. • Foot: uses to move
  25. 25. • Foot: uses to move• Visceral mass: contains organs
  26. 26. • Foot: uses to move• Visceral mass: contains organs• Mantle: covers organs, protects mollusks without a shell
  27. 27. • Foot: uses to move• Visceral mass: contains organs• Mantle: covers organs, protects mollusks without a shell• Shell: Most mollusks -- secreted by the mantle
  28. 28. Eating!
  29. 29. Eating!• Clams: filter water
  30. 30. Eating!• Clams: filter water• Snails and slugs: radula—ribbon-like tongue with curved teeth
  31. 31. Eating!• Clams: filter water• Snails and slugs: radula—ribbon-like tongue with curved teeth• Cephalopods: catch prey with tentacles
  32. 32. Heart!
  33. 33. Heart!• Open circulatory system--gastropods and bivalves
  34. 34. Heart!• Open circulatory system--gastropods and bivalves – Heart pumps blood into open spaces in animal’s body
  35. 35. Heart!• Open circulatory system--gastropods and bivalves – Heart pumps blood into open spaces in animal’s body• Closed circulatory system--cephalopods
  36. 36. Heart!• Open circulatory system--gastropods and bivalves – Heart pumps blood into open spaces in animal’s body• Closed circulatory system--cephalopods – Heart pumps blood through blood vessels
  37. 37. Brain!
  38. 38. Brain!• Mollusks have nerves throughout body control--breathing, eating and moving
  39. 39. Brain!• Mollusks have nerves throughout body control--breathing, eating and moving
  40. 40. Brain!• Mollusks have nerves throughout body control--breathing, eating and moving• Cephalopods have more complex nervous system – Most advanced of all invertebrates
  41. 41. Brain!• Mollusks have nerves throughout body control--breathing, eating and moving• Cephalopods have more complex nervous system – Most advanced of all invertebrates – Smartest invertebrate
  42. 42. Words and pictures fordichotomous Mollusk Key The edges The grooves of this leaf on this shell are are radiating serrated The grooves on this shell are circular
  43. 43. Right-handed and left-handed mollusks
  44. 44. This shell Oblong has teeth shape on either side of the Round opening shapeThis object This shellhas a looksconical inflatedshape
  45. 45. Canal Long spire short spire No protrusions Protrusion or nodules Canal

×