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Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
Amphibians
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Amphibians

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  • 1. Phylum Chordata! Class amphibia
  • 2. Class amphibia!The amphibians – First vertebrates to inhabit landStill live part of life in water – MetamorphosisAprx. 5,000 species!Characteristics – Moist skin for gas exchange – Ectothermic – Larval stage • metamorphosis
  • 3. Movement from water to land What does it take to move from water to land? What has to change?
  • 4. Small adaptations through Evolution
  • 5. Transition from water to landLiving on land brings different challenges– Example: movement.Amphibians are tetrapods:– “four footed: two sets of paired appendages that are modified as legs that can support the animal.Lungs to avoid drying out.
  • 6. Adaptations = land livingNew adaptations forliving on land– Lungs– Ears– Four limbs with feet and digits
  • 7. CHARACTERISTICSEctothermic– Regulate temperature from outside sources. • Basking in the sun • Water temperatureVs. EndothermicWhat would be theadvantages of both?
  • 8. Ectothermic: AdvantagesSlow Metabolism– Eat lessMust self warmblood enough to beactiveNot enough energyfor continued hardwork
  • 9. CHARACTERISTICSRespiration: Porous skin– Allow for gas exchange (breathing)– Must live in moist environments to avoid drying outSensitive to chemicals inthe environmentSalamanders do not have lungs andmust breath through skin
  • 10. REPRODUCTIONInternal sexual reproductionLay 100s of eggs– Advantage of over population of offspring?
  • 11. METAMORPHOSIS Amphibian = double life
  • 12. DIGESTIONAdults: carnivores– Use sticky tongue to trap and suck in prey– Eat anything that is small enough to swallow whole.Does that make them activepredators or scavengers?Larva: herbivores
  • 13. SENSESGreat hearing and eyesight– Hearing is Important for terrestrial livingFrogs can see color!Other senses…– Chemical receptors on skin– Taste buds on tongue– Nasal senses
  • 14. ECOLOGICAL ROLEImportant prey for:– Racoons, opossums, birdsImportant predatorof– Mice, rats, insects

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