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Reminders

Reminders . Turn in HOURS HOURS are due TODAY Insect test retakes this week only! Grade worksheets in a few minutes Next week is Shark week, this week is an introduction to all chordates/vertebrates. The Vertebrate Animals. All Vertebrates are Chordates Phylum chordata!.

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Reminders

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  1. Reminders • Turn in HOURS HOURS are due TODAY • Insect test retakes this week only! • Grade worksheets in a few minutes • Next week is Shark week, this week is an introduction to all chordates/vertebrates.

  2. The Vertebrate Animals

  3. All Vertebrates are ChordatesPhylum chordata! • Chordates ALL have 4 characteristics sometime during their lives • a notochord • nerve cord • gill slits • a tail

  4. The non-vertebrate chordates - Tunicates

  5. Amphioxus

  6. About the Amphioxus song

  7. 99% of chordates are vertebrates - Characteristics of Vertebrates • Bilateral Symmetry with 2 pairs of appendages, • cephalization (sense organs concentrated in a head region) • True body cavity • closed circulatory system. • Endoskeleton including a vertebral column • Well developed body systems.

  8. Comparative Numbers of Species

  9. Classes of Vertebrates • Jawless fish • Cartilaginous Fishes • Bony Fish • Amphibians • Reptiles • Birds • Mammals

  10. Jawless Fish • Primitive, no paired fins • no bone, all cartilage • Lamprey – a parasite • Hagfish – scavenger, also called slime eel.

  11. Jawless Fish

  12. Cartilage Fish • Sharks, skates, rays • 750 species • Ventral mouth • Spiral valve increases surface area • Massive liver (up to half body weight) • skin with tooth-like scales

  13. Cartilage Fish

  14. Bony Fish • 20-30,000 species • Appeared 400 million years ago • Cold blooded, flat scales, swim bladder • gills and gill cover • Most lay eggs • eyes usually on the side of the head

  15. Bony Fish

  16. Amphibians • 2000 species, appeared 350 million years ago. • Cold-blooded, moist skin, lungs, no claws • Lay jellylike eggs • Life cycle includes a larval stage • 90% are frogs and toads

  17. Amphibians

  18. Reptiles • 6500 species, appeared 300 million years ago. • Cold-blooded, hard shelled eggs, internal fertilization • Body covered with scales. • Include crocodilians, lizards and snakes, turtles and the tuatara

  19. Reptiles

  20. Birds • 8600 species, appeared 130 million years ago. • Warm blooded, 4 chambered heart • Feathered dinosaurs • Feathers, crop, oil glands, hollow bones, fused skeleton---all adaptations for flight.

  21. Birds

  22. Mammals • First appeared 180 million years ago • 4500 species, most are placental. • 2 primitive orders; monotremes and marsupials • Diaphragm, hair, mammary glands, lips, different kinds of teeth, external ears.

  23. Mammals

  24. Vert./Chordate Quiz Tuesday!!! For more information 7 Vertebrate Classes.doc On WBP and Shared drive

  25. The Vertebrate Animals

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