Animals: Worms-flat, round & segmented Ch 33
Invertebrate Diversity <ul><li>Evolutionary innovations in sponges & cnidarians </li></ul><ul><li>A.  Presence or absence ...
Body Cavities Acoelomate Pseudocoelomate Coelomate
Protostomes vs. Deuterostomes
Radiata Eumetazoa Metazoa Porifera Bilateria * Platyhelminthes (Flatworms) Lophotrochozoa
 
Platyhelminthes <ul><li>True tissues  </li></ul><ul><li>Bilateral symmetry </li></ul><ul><li>What goes along with this? </...
Platyhelminthes http://www.pbs.org/kcet/shapeoflife/episodes/hunt_explo2.html Cross fertilize Mesoderm -> muscle layer eye...
Parasitic adaptations 1.  Attachment <ul><li>Reproduction  -->  hypertrophy of reproductive organs </li></ul>
Platyhelminthes Parasitic Fluke Tapeworm Similar to 33.8
Hooks & suckers Scolex Tapeworm proglottid Similar to Fig. 33.7
Platyhelminthes
Complex life cycle - Intermediate hosts  - cattle,  fish & pigs Definitive host -  human    (final host) 7 sp. Human tapew...
Pig tapeworm
Some symptoms : From bulk of worm and toxic excretory products
Radiata Eumetazoa Metazoa Porifera Bilateria * *Nematoda Pseudocoelomate Protostome Lophotrochozoa Ecdysozoa
Nematoda True Tissues  Bilateral Symmetry Pseduocoelomate Protostomes > 100,000 spp. Important in recycling nutrients -  d...
Parasitic Nematodes Roundworms -  Ascaris sp. Hookworms Heartworms Pinworms Whipworms Guinea worm Canid  roundworm Canid w...
Hookworms magnified many times  -- thank goodness!
Heart and pin worms Heartworms Pinworms
 
Elephantiasis Caused by filarial worm
Guinea Worm
Radiata Eumetazoa Metazoa Porifera Bilateria * *Annelida Coelomate Protostome Lophotrochozoa
True Tissues  Bilateral Symmetry Coelomate Protostome P. Annelida 16,500 spp. http://www.pbs.org/kcet/shapeoflife/episodes...
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Bmz Worms Bb

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  • Bmz Worms Bb

    1. 1. Animals: Worms-flat, round & segmented Ch 33
    2. 2. Invertebrate Diversity <ul><li>Evolutionary innovations in sponges & cnidarians </li></ul><ul><li>A. Presence or absence of tissues </li></ul><ul><li>B. Radial symmetry </li></ul><ul><li>II. Worms - flat and round </li></ul><ul><ul><li>Parasitic adaptations in worms </li></ul></ul><ul><li>III. Adaptive radiation in molluscs (how body plan reflects </li></ul><ul><li>habitat and way of life) </li></ul><ul><li>IV. Why are arthropods so successful? </li></ul><ul><li>Evolution of chordates </li></ul><ul><ul><li>A. Vertebrates </li></ul></ul>
    3. 3. Body Cavities Acoelomate Pseudocoelomate Coelomate
    4. 4. Protostomes vs. Deuterostomes
    5. 5. Radiata Eumetazoa Metazoa Porifera Bilateria * Platyhelminthes (Flatworms) Lophotrochozoa
    6. 7. Platyhelminthes <ul><li>True tissues </li></ul><ul><li>Bilateral symmetry </li></ul><ul><li>What goes along with this? </li></ul>20,000 spp. <ul><li>Acoelomate </li></ul><ul><li>Protostomes </li></ul><ul><li>3 embryonic germ layers </li></ul>
    7. 8. Platyhelminthes http://www.pbs.org/kcet/shapeoflife/episodes/hunt_explo2.html Cross fertilize Mesoderm -> muscle layer eyespots Free living Planaria sp.
    8. 9. Parasitic adaptations 1. Attachment <ul><li>Reproduction --> hypertrophy of reproductive organs </li></ul>
    9. 10. Platyhelminthes Parasitic Fluke Tapeworm Similar to 33.8
    10. 11. Hooks & suckers Scolex Tapeworm proglottid Similar to Fig. 33.7
    11. 12. Platyhelminthes
    12. 13. Complex life cycle - Intermediate hosts - cattle, fish & pigs Definitive host - human (final host) 7 sp. Human tapeworms Can be 25 meters long Most common - beef tapeworm cysts in muscles of cattle undercooked meat -> attaches to intestine Human tapeworm
    13. 14. Pig tapeworm
    14. 15. Some symptoms : From bulk of worm and toxic excretory products
    15. 16. Radiata Eumetazoa Metazoa Porifera Bilateria * *Nematoda Pseudocoelomate Protostome Lophotrochozoa Ecdysozoa
    16. 17. Nematoda True Tissues Bilateral Symmetry Pseduocoelomate Protostomes > 100,000 spp. Important in recycling nutrients - decomposers Also plant parasites e.g., potatoes, soybeans, onions Animal parasites e.g., roundworms heartworms, hookworm, Most free living
    17. 18. Parasitic Nematodes Roundworms - Ascaris sp. Hookworms Heartworms Pinworms Whipworms Guinea worm Canid roundworm Canid whipworm
    18. 19. Hookworms magnified many times -- thank goodness!
    19. 20. Heart and pin worms Heartworms Pinworms
    20. 22. Elephantiasis Caused by filarial worm
    21. 23. Guinea Worm
    22. 24. Radiata Eumetazoa Metazoa Porifera Bilateria * *Annelida Coelomate Protostome Lophotrochozoa
    23. 25. True Tissues Bilateral Symmetry Coelomate Protostome P. Annelida 16,500 spp. http://www.pbs.org/kcet/shapeoflife/episodes/explo_explo2.html

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