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Transcript

  • 1. Overview of Phylum Chordata
    Essential Question: What characteristics to all chordates have in common?
    Essential Question: What classes of animals make up phylum Chordata?
  • 2. 4 Characteristics of Chordate Embryos
    • Dorsal hollow nerve cord – becomes the spinal cord
    • 3. Notochord – becomes the backbone in most chordates
    • 4. Pharyngeal pouches – develop into gills in fish; inner ear in other chordates
    • 5. Post-anal tail – many chordates maintain tail
  • Class: Agnatha “Jawless Fish”
    Maintain notochord
    No scales or fins
    No jaws
    Hard plates in mouth
    Carnivores or parasites
    Gills
    Marine & fresh water
    Ectotherm
  • 6. Class: Condrichythes “Sharks, Rays & Skates”
    Skeleton of cartilage
    Paired fins
    Most are carnivores; some filter feeders
    Placoid scales
    Teeth that point inward
    Gills
    All marine
    Ectotherm
  • 7. Class: Osteichthyes “Bony Fish”
    Paired fins & scales
    Swim bladder
    Chromatophores
    Lateral Line
    Gills
    Marine & fresh water
    Ectotherm
  • 8. Class: Amphibia “Frogs, Toads, Salamanders”
    Metamorphosis
    Larva = gills
    Adults = lungs
    3 chambered heart
    Smooth skin
    Cutaneous respiration
    Ectotherm
  • 9. Class: Reptilia “Turtles, Snakes, Lizards”
    Amniotic egg
    Lungs only
    Partially 4 chambered heart
    Scales
    Keratin
    Many have toes, claws
    Ectotherm
  • 10. Class: Aves “Birds”
    Amniotic egg
    Feathers
    Beak
    Crop
    4 chambered heart
    Migration
    Endotherm
  • 11. Class: Mammalia “Horses, Dogs, Tapirs”
    Hair
    Placenta
    Mammary Glands
    Milk Production
    4 chambered heart
    Endotherm
  • 12. Take a moment – With your partner…
    Discuss what characteristics would you expect the following animals to have?