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MARINE WORMS
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Parasite Project
• Power point presentation• Requirements:– Title slide (parasite and group member names)– Disease information (multiple slides)• Symptoms, what they do to the body, cures- life cycle-reproduction-organism structures/characteristics-works cited
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Phylum Nemertea – ribbon worms
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Ribbon worm video
• http://www.youtube.com/watch?v=y4-AZ4FYJCI
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Phylum Nemotoda - roundworms
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Nematoda- roundworms
• Anisakis• Parasite in dolphins and seals• Larvae live in flesh of fish• Ascaris• Live in intestine of pigs, horses and humans• Can produce 200,000 eggs per day
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Ascaris life cycle
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Roundworm video
• http://www.youtube.com/watch?v=Z9RJHkzQtXc
• http://www.youtube.com/watch?v=gZfrkN8fq1Q&feature=fvwp&NR=1
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CDC hookworm
• http://www.cdc.gov/parasites/hookworm/
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Phylum Chaetognatha – arrow worms
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Bristle worms
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Arrow worm video
• http://www.youtube.com/watch?v=mpJ2uyUHR-o
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Phylum Pogonophora – deep-sea tube worms
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Phylum Sipunculida – peanut worms
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Peanut worm video
• http://www.youtube.com/watch?v=CVzKlhGWPwE
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Phylum Platyhelminthes – flatworms
• Includes tapeworms, freshwater planaria, parasitic flukes• Some parasites, many free-living
predators and scavengers• Can cause swimmer’s itch in
people
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Phylum Platyhelminthes – flatworms
tapeworm planaria
parasitic fluke
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Phylum Platyhelminthes – flatworms• Flattened
• Lack segmentation• Bilateral symmetry – simplest organisms
to have it• Acoelomate – no body cavity
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Phylum Platyhelminthes – flatworms
• Mouth and anus are same spot
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Phylum Platyhelminthes - flatworms
• Central nervous system (simplest organisms to posess) – bunch of nerve cells (ganglion) and two nerve cords
• Cephalization• Light sensitive eyespots
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Phylum Platyhelminthes – flatworms
• Beginning of organ development• No true respiratory, excretory system –
diffusion through surface• Sexual (and asexual) reproduction -
hermaphrodites
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Phylum Platyhelminthes – flatworms
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3 classes of Platyhelminthes
• Turbellaria- ex. planaria• Trematoda ex. flukes• Cestoda- tapeworms
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Fluke life cycle
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Fluke slapping In whales
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Platyhelminthes video
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Human Tapeworm video
• http://www.youtube.com/watch?v=FW76UxudEMk
• Whipworm: http://www.youtube.com/watch?v=FU3bGh6_e0g
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Phylum Annelida – segmented worms
• Includes earthworm, leeches, marine polychaetes (bristle worms)
• Body divided into ring-like segments• Thousands of species
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Phylum Annelida – segmented worms
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Phylum Annelida - Polychaetes
• Most common types of marine annelids• Have external, paddle-shaped structures
(parapodia) with chaetae or bristles–external gills or appendages
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Phylum Annelida – segmented worms
• Coelom – fluid-filled body space – between digestive tube and body wall
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Phylum Annelida – segmented worms
• Hydrostatic skeleton – uses fluid in coelom – helps animal move
• One-way digestive tube - mouth and anus
• Bilateral symmetry
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Phylum Annelida – segmented worms
• More developed organ systems:–Digestive system–Nervous system–Circulatory system•With hemoglobin to carry oxygen•Closed – blood in veins, arteries and
capillaries
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Phylum Annelida – segmented worms
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Phylum Annelida – segmented worms
• Many lifestyles:- burrow- swim- sessile- live in tubes
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Phylum Annelida – segmented worms
• feeding strategies:Parasites - attach to other organisms
and feed through suckers
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Phylum Annelida – segmented worms
• feeding strategies:Suspension feeders – trap particles
floating in water
feather duster worm Christmas tree worms
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Christmas Tree Worms
• Polychaetes
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Octonauts Christmas Tree Worms
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Phylum Annelida – segmented worms
• feeding strategies:Deposit feeders – eat particles that have
fallen to sea floor
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Phylum Annelida – segmented worms
• feeding strategies:Predators – use “teeth” to grab prey
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Phylum Annelida – segmented worms
• Nereis sp. – sandworm, clamworm–used for bait
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Annelida video
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Types of Marine Worms
• Phylum *Platyhelminthes – flatworms• Phylum Nemertea – ribbon worms• Phylum Nematoda – roundworms• Phylum Chaetognatha – arrow worms• Phylum Pogonophora – deep-sea tube
worms• Phylum Sipunculida – peanut worms• Phylum *Annelida - segmented worms