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MARINE WORMS 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 Phylum Nemertea – ribbon worms Ribbon worm video • http://www.youtube.com/watch?v=y4AZ4FYJCI Phylum Nemotoda - roundworms 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 Ascaris life cycle Roundworm video • http://www.youtube.com/watch?v=Z9RJHkzQ tXc • http://www.youtube.com/watch?v=gZfrkN8fq 1Q&feature=fvwp&NR=1 CDC hookworm • http://www.cdc.gov/parasites/hookworm/ Phylum Chaetognatha – arrow worms Bristle worms Arrow worm video • http://www.youtube.com/watch?v=mpJ2uyU HR-o Phylum Pogonophora – deep-sea tube worms Phylum Sipunculida – peanut worms Peanut worm video • http://www.youtube.com/watch?v=CVzKlhGW PwE Phylum Platyhelminthes – flatworms • Includes tapeworms, freshwater planaria, parasitic flukes • Some parasites, many free-living predators and scavengers • Can cause swimmer’s itch in people Phylum Platyhelminthes – flatworms parasitic fluke tapeworm planaria Phylum Platyhelminthes – flatworms • Flattened • Lack segmentation • Bilateral symmetry – simplest organisms to have it • Acoelomate – no body cavity Phylum Platyhelminthes – flatworms • Mouth and anus are same spot Phylum Platyhelminthes - flatworms • Central nervous system (simplest organisms to posess) – bunch of nerve cells (ganglion) and two nerve cords • Cephalization • Light sensitive eyespots Phylum Platyhelminthes – flatworms • Beginning of organ development • No true respiratory, excretory system – diffusion through surface • Sexual (and asexual) reproduction hermaphrodites Phylum Platyhelminthes – flatworms 3 classes of Platyhelminthes • Turbellaria- ex. planaria • Trematoda ex. flukes • Cestoda- tapeworms Fluke life cycle Fluke slapping In whales Platyhelminthes video Human Tapeworm video • http://www.youtube.com/watch?v=FW76Uxu dEMk • Whipworm: http://www.youtube.com/watch?v=FU3bGh6 _e0g Phylum Annelida – segmented worms • Includes earthworm, leeches, marine polychaetes (bristle worms) • Body divided into ring-like segments • Thousands of species Phylum Annelida – segmented worms Phylum Annelida - Polychaetes • Most common types of marine annelids • Have external, paddle-shaped structures (parapodia) with chaetae or bristles – external gills or appendages Phylum Annelida – segmented worms • Coelom – fluid-filled body space – between digestive tube and body wall Phylum Annelida – segmented worms • Hydrostatic skeleton – uses fluid in coelom – helps animal move • One-way digestive tube - mouth and anus • Bilateral symmetry 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 Phylum Annelida – segmented worms Phylum Annelida – segmented worms • Many lifestyles: - burrow - swim - sessile - live in tubes Phylum Annelida – segmented worms • feeding strategies: Parasites - attach to other organisms and feed through suckers Phylum Annelida – segmented worms • feeding strategies: Suspension feeders – trap particles floating in water feather duster worm Christmas tree worms Christmas Tree Worms • Polychaetes Octonauts Christmas Tree Worms Phylum Annelida – segmented worms • feeding strategies: Deposit feeders – eat particles that have fallen to sea floor Phylum Annelida – segmented worms • feeding strategies: Predators – use “teeth” to grab prey Phylum Annelida – segmented worms • Nereis sp. – sandworm, clamworm – used for bait Annelida video 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
