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Vertebrates

Vertebrates

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Vertebrates

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  1. Vertebrates • Perhaps the animals with which you are most familiar are vertebrates. What are the major classes of vertebrates? • amphibians • reptiles • fishes • birds • mammals Wikimedia Commons free use

  2. Amphibians • Examples: • frogs, salamanders • Characteristics: • Ectotherms (controls body temperature through external means) • Lay eggs in water • Adult breathes air • Must maintain most skin Wikimedia commons free use

  3. Reptiles • Examples: • alligator, lizard, crocodile, snake, turtle • Characteristics: • Ectotherms (controls body temperature through external means) • Four appendages (or have ancestors with four appendages) • Lay eggs on land (except some snakes) • Covered in scales Wikimedia Commons free use

  4. Fish • Examples: • perch, catfish, trout, salmon • Characteristics: • Aquatic ectotherms • Bodies covered with scales • Breathe with gills • Have fins • Lay eggs in water Elma from Reykjavík Wikimedia Commons

  5. Birds • Examples: • blue jay, cardinal, robin, eagle hawk • Characteristics: • Endotherms (warm blooded-controls body temperature through internal means) • Body covered with feathers • Wings • Lay eggs Dori Wikimedia Commons

  6. Mammals • Examples: • cat, dog, human, bat, mouse, rat, zebra • Characteristics: • Endotherms • Body covered with hair • Mammary (milk) glands • Breathe air • Have three middle-ear bones Wikimedia Commons free use