Transcript MARINE WORMS

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
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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
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• 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
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Phylum Pogonophora – deep-sea tube
worms
Phylum Sipunculida – peanut worms
Peanut worm video
• http://www.youtube.com/watch?v=CVzKlhGW
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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
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
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• Whipworm:
http://www.youtube.com/watch?v=FU3bGh6
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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
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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