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Vertebrates: Part I

Vertebrates: Part I

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Vertebrates: Part I

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  1. Vertebrates: Part I Fishes & Amphibians

  2. Fishes • Live in freshwater or saltwater • Bone or cartilage protects brain & spinal cord • Gills for respiration • Mostly external fertilization

  3. Classes of Fishes • Agnatha (Jawless Fish) • Lampreys • Chondrichthyes (Cartilaginous Fish) • Sharks, rays • Osteichthyes (Bony Fish) • Most common fish

  4. Fish Structure

  5. Amphibians (Amphi- double) • Ectothermic • Most have metamorphosis • 2 Big Groups • Anura: frogs, salamanders • Caudata: salamanders, newts

  6. Problems with life on land • Drying out • Respiration • Reproduction • Movement • Temperature Control

  7. Frog Life Cycle