Marine worms powerpoint

9,797 views

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
9,797
On SlideShare
0
From Embeds
0
Number of Embeds
520
Actions
Shares
0
Downloads
117
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Marine worms powerpoint

  1. 1. MARINE WORMS
  2. 2. Types of Marine Worms <ul><li>Phylum *Platyhelminthes – flatworms </li></ul><ul><li>Phylum Nemertea – ribbon worms </li></ul><ul><li>Phylum Nematoda – roundworms </li></ul><ul><li>Phylum Chaetognatha – arrow worms </li></ul><ul><li>Phylum Pogonophora – deep-sea tube worms </li></ul><ul><li>Phylum Sipunculida – peanut worms </li></ul><ul><li>Phylum *Annelida - segmented worms </li></ul>
  3. 3. Phylum Nemertea – ribbon worms
  4. 4. Phylum Nemotoda - roundworms
  5. 5. Phylum Chaetognatha – arrow worms
  6. 6. Phylum Pogonophora – deep-sea tube worms
  7. 7. Phylum Sipunculida – peanut worms
  8. 8. Phylum Platyhelminthes – flatworms <ul><li>Includes tapeworms, freshwater planaria, parasitic flukes </li></ul><ul><li>Some parasites, many free-living predators and scavengers </li></ul><ul><li>Can cause swimmer’s itch in people </li></ul>
  9. 9. Phylum Platyhelminthes – flatworms tapeworm planaria parasitic fluke
  10. 10. Phylum Platyhelminthes – flatworms <ul><li>Flattened </li></ul><ul><li>Lack segmentation </li></ul><ul><li>Bilateral symmetry – simplest organisms to have it </li></ul><ul><li>Acoelomate – no body cavity </li></ul>
  11. 11. Phylum Platyhelminthes – flatworms <ul><li>Mouth and anus are same spot </li></ul>
  12. 12. Phylum Platyhelminthes - flatworms <ul><li>Central nervous system (simplest organisms to posess) – bunch of nerve cells (ganglion) and two nerve cords </li></ul><ul><li>Light sensitive eyespots </li></ul><ul><li>Three layers of cells </li></ul>
  13. 13. Phylum Platyhelminthes – flatworms <ul><li>Beginning of organ development </li></ul><ul><li>No true respiratory, excretory system – diffusion through surface </li></ul><ul><li>Sexual (and asexual) reproduction - hermaphrodites </li></ul>
  14. 14. Phylum Platyhelminthes – flatworms
  15. 15. Phylum Annelida – segmented worms <ul><li>Includes earthworm, leeches, marine polychaetes (bristle worms) </li></ul><ul><li>Body divided into ring-like segments </li></ul><ul><li>Thousands of species </li></ul>
  16. 16. Phylum Annelida – segmented worms
  17. 17. Phylum Annelida - Polychaetes <ul><li>Most common types of marine annelids </li></ul><ul><li>Have external, paddle-shaped structures (parapodia) with chaetae or bristles </li></ul><ul><ul><li>external gills or appendages </li></ul></ul>
  18. 18. Phylum Annelida – segmented worms <ul><li>Coelom – fluid-filled body space – between digestive tube and body wall </li></ul>
  19. 19. Phylum Annelida – segmented worms <ul><li>Hydrostatic skeleton – uses fluid in coelom – helps animal move </li></ul><ul><li>One-way digestive </li></ul><ul><li>tube - mouth and </li></ul><ul><li>anus </li></ul><ul><li>Bilateral symmetry </li></ul>
  20. 20. Phylum Annelida – segmented worms <ul><li>More developed organ systems: </li></ul><ul><ul><li>Digestive system </li></ul></ul><ul><ul><li>Nervous system </li></ul></ul><ul><ul><li>Circulatory system </li></ul></ul><ul><ul><ul><li>With hemoglobin to carry oxygen </li></ul></ul></ul><ul><ul><ul><li>Closed – blood in veins, arteries and capillaries </li></ul></ul></ul>
  21. 21. Phylum Annelida – segmented worms
  22. 22. Phylum Annelida – segmented worms <ul><li>Many lifestyles: </li></ul><ul><li>- burrow </li></ul><ul><li>- swim </li></ul><ul><li>- sessile </li></ul><ul><li>- live in tubes </li></ul>
  23. 23. Phylum Annelida – segmented worms <ul><li>feeding strategies: </li></ul><ul><ul><li>Parasites - attach to other organisms and feed through suckers </li></ul></ul>
  24. 24. Phylum Annelida – segmented worms <ul><li>feeding strategies: </li></ul><ul><ul><li>Suspension feeders – trap particles floating in water </li></ul></ul>feather duster worm Christmas tree worms
  25. 25. Phylum Annelida – segmented worms <ul><li>feeding strategies: </li></ul><ul><ul><li>Deposit feeders – eat particles that have fallen to sea floor </li></ul></ul>
  26. 26. Phylum Annelida – segmented worms <ul><li>feeding strategies: </li></ul><ul><ul><li>Predators – use “teeth” to grab prey </li></ul></ul>
  27. 27. Phylum Annelida – segmented worms <ul><li>Nereis sp. – sandworm, clamworm </li></ul><ul><ul><li>used for bait </li></ul></ul>

×