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Amphibians

Amphibians. 1 st tetrapods. Classification. Kingdom – Animalia Phylum - Chordata Class Amphibia 3 Orders Anura (Frogs & Toads) Urodela (Salamanders) Apoda (Caecilians). Characteristics. Ectothermic 3-chambered heart (Double circulation)

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Amphibians

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  1. Amphibians 1sttetrapods

  2. Classification Kingdom – Animalia Phylum - Chordata Class Amphibia 3 Orders • Anura (Frogs & Toads) • Urodela (Salamanders) • Apoda (Caecilians)

  3. Characteristics • Ectothermic • 3-chambered heart (Double circulation) • Smooth skin, lacks scales (Desiccation if dry) • Cutaneous respiration • Lungs (Positive pressure mouth breathing) • Excretes urea • Lack claws on toes

  4. Anura

  5. In amphibians, the blood makes two passes through the heart. Heart ---> lungs --> heart ---> body

  6. Metamorphosis

  7. Amplexus

  8. Frogspawn

  9. Tadpole

  10. Froglet

  11. Frog Defenses

  12. Bioindicators

  13. Urodela • Salamanders • Newts (Efts) • Mudpuppies

  14. Apoda

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