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Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
Chapter 33 Part 1
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Chapter 33 Part 1

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Transcript

  • 1. Chapters 33 and 34: A REVIEW
  • 2. Phylogeny of Extant Phyla
  • 3. Phylum Porifera
  • 4. Porifera Characteristics
    • Sponges
    • Sole member of the Parazoa
    • Lack true tissues, simplest animals, no nerves or muscles
    • Choanocytes (collar cells)  “Unique flagellated cells that ingest bacteria and tiny food particles”
    • Choanocytes look a lot like Choanoflagellates
    • Amoebocytes transfer food to rest of cells
    • Adults sessile, larvae non-sessile
    • “ Cells tend to be totipotent (retain zygote’s ability to form the whole animal)”
  • 5. Choanocytes
  • 6. Amoebocytes
  • 7. Anatomy of Simple Sponge
  • 8. A More Complex Sponge
  • 9. Phylum Cnidaria
  • 10. Cnidaria Characteristics
    • Hydras, Jellies, Sea Anenomies, Corals
    • Diploblastic, Carnivorous, Tentacled
    • Lack true muscles (since no mesoderm)
    • Possess nerve net
    • Cnidocytes  Cells that shoot stinging or grasping threads at potential prey
    • Gastrovascular cavity (only one opening) = Hydrostatic Skeleton
    • Polyps vs. Medusa
  • 11. Cnidocytes
  • 12. Cnidaria Anatomy
  • 13. Class Hydrozoa
  • 14. Class Scyphozoa
  • 15. Class Anthozoa
  • 16. A Cnidarian Life Cycle ( Obelia )
  • 17. Phylum Platyhelminthes
  • 18. Platyhelminth Characteristics
    • Flatworms (including Flukes and Tapeworms )
    • Bilaterally symmetrical acoelomates
    • Flat, unsegmented, single opening to gastrovascular cavity
    • Eyespots
    • No circulatory system (instead diffusion)
    • Tapeworms have no digestive system
    • Use ventral cilia to locomote across surfaces (but some can swim)
    • Ganglia-processing centers
  • 19. Planarian Anatomy
  • 20. Fluke Lifecycle
  • 21. Tapeworm Anatomy
  • 22. Phylum Rotifera
  • 23. Rotifer Characteristics
    • Rotifers
    • Very small animals
    • Possess complete digestive tract
    • Pseudocoelomates
    • Aquatic, essentially serve as animals that approximate the protozoan niche
  • 24. Phylum Nematoda
  • 25. Nematode Characteristics
    • Round worms (including pinworms & hookworms )
    • Cuticle that keeps them from drying out
    • Pseudocoelamates—pseudocoelom is used as a hydrostatic skeleton
    • There are many free-living nematodes as well as parasitic nemotodes
    • Only longitudinal muscles—whip-like motions
    • Include Trichenella spiralis, Ascaris, and the filarial worm
  • 26. A Roundworm
  • 27. Phylum Mollusca
  • 28. Mollusk Characteristics
    • Snails, Slugs, Clams, Squids, Octopi, etc.
    • Class Polyplacophora , Gastropoda , Class Bivalvia , Class Cephalopoda , etc.
    • Basic body plan built around a muscular foot , a visceral mass , and a mantle
    • Not all mollusks have a shell
    • Mollusks lack segmentation
    • Most have an open circulatory system
    • Some (cephalopods) have a closed circulatory system
  • 29. Class Polyplacophora (chitons)
  • 30. Class Gastropoda
  • 31. Class Bivalvia
  • 32. Class Bivalvia
  • 33. Class Cephalopoda
  • 34. Closed vs. Open Circulation
  • 35. Phylum Annelida
  • 36. Annelid Characteristics
    • Segmented worms (earth, marine, leeches)
    • Class Oligochaeta (I.e., earth worms), Class Polychaeta (e.g., clam worms), Class Hirudinea (I.e., leeches)
    • Protostomes, Body segments, Closed circulatory system
  • 37.  
  • 38. Class Oligochaeta
  • 39. Class Polychaeta
  • 40. Class Hirudinea
  • 41. Phylum Arthropoda
  • 42. Arthropod Characteristics
    • Insects, Crustaceans, Spiders, Scorpions, Horseshoe crabs, Millipedes, Centipedes, Ticks, Mites, etc.
    • Protostomes with segmented bodies, jointed appendages, and hard (chitinous) exoskeletons
    • Also have well-developed senses and open circulation (remember the terms hemocoel and hemolymph)
  • 43. Subphylum Trilobita
  • 44. Subphylum Cheliceriformes
  • 45. Subphylum Crustacea
  • 46. Phylum Echinodermata
  • 47. Echinoderm Characteristics
    • Sea stars (Class Asteroida), brittle stars (Class Ophiuroidea), sea urchin (Class Echinoidea), sea lilies (Class Crinoidea), sea cucumbers (Class Holothuroidea), sea daisies (Class Concentricycloidea)
    • Coelomates, Deuterostomes
    • Multiple arms, tube feet, water vascular system, calciferous endoskeleton
    • Larvae are bilaterally symmetrical and adult forms appear to have radial symmetry (though they are not truly radial animals)
  • 48.
    • All 7,000 or so species of echinoderms are marine.
    • Examples are:
      • sea stars
      • brittle stars
      • sea urchins
      • sea lilies and feather stars
      • sea cucumbers
      • sea daisies
      • sand dollars
  • 49. Starfish Anatomy
  • 50. Tube feet
  • 51. Phylum Chordata

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