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=y4-AZ4FYJCI

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=Z9RJHkzQtXc

• http://www.youtube.com/watch?v=gZfrkN8fq1Q&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=mpJ2uyUHR-o

Phylum Pogonophora – deep-sea tube worms

Phylum Sipunculida – peanut worms

Peanut worm video

• http://www.youtube.com/watch?v=CVzKlhGWPwE

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

tapeworm planaria

parasitic fluke

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=FW76UxudEMk

• 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