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Flatworms
 

Flatworms

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Flatworms Flatworms Presentation Transcript

  • Flatworms:Planarians, Flukes, and Tapeworms
  • Flatworm Facts:
  • Flatworm Facts:• Simplest group of worms
  • Flatworm Facts:• Simplest group of worms• Symmetry? – Bilateral
  • Flatworm Facts:• Simplest group of worms• Symmetry? – Bilateral• Head
  • Flatworm Facts:• Simplest group of worms• Symmetry? – Bilateral• Head• No anus
  • Planarian Facts:
  • Planarian Facts:• Smaller than length of fingernail
  • Planarian Facts:• Smaller than length of fingernail• Have eyespots and sensory lobes
  • Planarian Facts:• Smaller than length of fingernail• Have eyespots and sensory lobes• Live in water and on land
  • 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
  • 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
  • Flukes and Tapeworms
  • Flukes and Tapeworms• All are parasites – Parasite is an organism that feeds on a host. • Host is usually not killed
  • 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
  • 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
  • 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.
  • Body Parts
  • Body Parts• Tiny heads, no eyespots or sensory lobes
  • Body Parts• Tiny heads, no eyespots or sensory lobes• Special suckers and hooks for attaching to host
  • 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
  • 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
  • Sheep Liver Fluke
  • Sheep Liver Fluke
  • Intestinal blood fluke
  • Intestinal blood fluke
  • Flukes in swim bladder of eel
  • Flukes in swim bladder of eel
  • Cat Tapeworm
  • Cat Tapeworm
  • Tapeworm found in fish—new contraceptive??
  • Tapeworm found in fish—new contraceptive??
  • Tapeworm that can infest humans
  • Tapeworm that can infest humans
  • • Can grow up to 15m
  • • Can grow up to 15m• Stays as a cyst in pork
  • Pork tapeworm pulled out of a human
  • Pork tapeworm pulled out of a human
  • Attachment organ of tapeworm
  • Attachment organ of tapeworm
  • Roundworms
  • Roundworms• Round, when viewed in cross section
  • Roundworms• Round, when viewed in cross section• Bilateral Symmetry
  • Roundworms• Round, when viewed in cross section• Bilateral Symmetry• Very small – 1 rotten apple 100,000 roundworms!
  • Roundworms• Round, when viewed in cross section• Bilateral Symmetry• Very small – 1 rotten apple 100,000 roundworms!• Primitive brain and nerve cords
  • 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
  • Parasitic roundworm from sea lion
  • Parasitic roundworm from sea lion
  • • Roundworms extracted from a Kenyan child
  • Cat and dog hookworms—you canpick up the eggs by walkingbarefoot
  • Cat and dog hookworms—you canpick up the eggs by walkingbarefoot