Flatworms

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  • Flatworms

    1. 1. Flatworms:Planarians, Flukes, and Tapeworms
    2. 2. Flatworm Facts:
    3. 3. Flatworm Facts:• Simplest group of worms
    4. 4. Flatworm Facts:• Simplest group of worms• Symmetry? – Bilateral
    5. 5. Flatworm Facts:• Simplest group of worms• Symmetry? – Bilateral• Head
    6. 6. Flatworm Facts:• Simplest group of worms• Symmetry? – Bilateral• Head• No anus
    7. 7. Planarian Facts:
    8. 8. Planarian Facts:• Smaller than length of fingernail
    9. 9. Planarian Facts:• Smaller than length of fingernail• Have eyespots and sensory lobes
    10. 10. Planarian Facts:• Smaller than length of fingernail• Have eyespots and sensory lobes• Live in water and on land
    11. 11. Planarian Facts:• Smaller than length of fingernail• Have eyespots and sensory lobes• Live in water and on land• Predators: eat other animals or parts of animals
    12. 12. Planarian Facts:• Smaller than length of fingernail• Have eyespots and sensory lobes• Live in water and on land• Predators: eat other animals or parts of animals• Pharynx pulls food into gut to be digested
    13. 13. Flukes and Tapeworms
    14. 14. Flukes and Tapeworms• All are parasites – Parasite is an organism that feeds on a host. • Host is usually not killed
    15. 15. Flukes and Tapeworms• All are parasites – Parasite is an organism that feeds on a host. • Host is usually not killed• Most live inside other animals
    16. 16. Flukes and Tapeworms• All are parasites – Parasite is an organism that feeds on a host. • Host is usually not killed• Most live inside other animals• Eggs pass out of host with host’s waste
    17. 17. Flukes and Tapeworms• All are parasites – Parasite is an organism that feeds on a host. • Host is usually not killed• Most live inside other animals• Eggs pass out of host with host’s waste• If eggs end up in drinking water or on food, they can be eaten by another host.
    18. 18. Body Parts
    19. 19. Body Parts• Tiny heads, no eyespots or sensory lobes
    20. 20. Body Parts• Tiny heads, no eyespots or sensory lobes• Special suckers and hooks for attaching to host
    21. 21. Body Parts• Tiny heads, no eyespots or sensory lobes• Special suckers and hooks for attaching to host• Some have special skin so they are not broken down by stomach acids
    22. 22. Body Parts• Tiny heads, no eyespots or sensory lobes• Special suckers and hooks for attaching to host• Some have special skin so they are not broken down by stomach acids• Tapeworms don’t have a gut – Absorb nutrients right from intestines of host
    23. 23. Sheep Liver Fluke
    24. 24. Sheep Liver Fluke
    25. 25. Intestinal blood fluke
    26. 26. Intestinal blood fluke
    27. 27. Flukes in swim bladder of eel
    28. 28. Flukes in swim bladder of eel
    29. 29. Cat Tapeworm
    30. 30. Cat Tapeworm
    31. 31. Tapeworm found in fish—new contraceptive??
    32. 32. Tapeworm found in fish—new contraceptive??
    33. 33. Tapeworm that can infest humans
    34. 34. Tapeworm that can infest humans
    35. 35. • Can grow up to 15m
    36. 36. • Can grow up to 15m• Stays as a cyst in pork
    37. 37. Pork tapeworm pulled out of a human
    38. 38. Pork tapeworm pulled out of a human
    39. 39. Attachment organ of tapeworm
    40. 40. Attachment organ of tapeworm
    41. 41. Roundworms
    42. 42. Roundworms• Round, when viewed in cross section
    43. 43. Roundworms• Round, when viewed in cross section• Bilateral Symmetry
    44. 44. Roundworms• Round, when viewed in cross section• Bilateral Symmetry• Very small – 1 rotten apple 100,000 roundworms!
    45. 45. Roundworms• Round, when viewed in cross section• Bilateral Symmetry• Very small – 1 rotten apple 100,000 roundworms!• Primitive brain and nerve cords
    46. 46. Roundworms• Round, when viewed in cross section• Bilateral Symmetry• Very small – 1 rotten apple 100,000 roundworms!• Primitive brain and nerve cords• Most are parasites – Humans pinworms and hookworms, trichinosis
    47. 47. Parasitic roundworm from sea lion
    48. 48. Parasitic roundworm from sea lion
    49. 49. • Roundworms extracted from a Kenyan child
    50. 50. Cat and dog hookworms—you canpick up the eggs by walkingbarefoot
    51. 51. Cat and dog hookworms—you canpick up the eggs by walkingbarefoot

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