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Amphibians

Amphibians . Ch. 17 C. Intro. “ amphibian ” comes from a Greek word meaning “double life” Many amphibians start their lives in water and end up on land Amphibians are ectothermic creatures Some have tails, others do not

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Amphibians

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  1. Amphibians Ch. 17 C

  2. Intro • “amphibian” comes from a Greek word meaning “double life” • Many amphibians start their lives in water and end up on land • Amphibians are ectothermic creatures • Some have tails, others do not • Some will go through hibernation(inactive during cold months) and estivation(inactive through hot, dry months)

  3. Metamorphosis Amphibians are the only vertebrate organisms to go through metamorphosisor a COMPLETE body change! This amazing process of going from a tadpole to an adult in a very short time is solid evidence against evolutionary theory and testimony to God’s creative nature!

  4. Metamorphosis Tadpole Adult • Young amphibians will have: • A tail that will be used for movement and nutrition • Gills • 2- chambered heart • No limbs • Vegetarian diet • Live in the water • Adult amphibians will have: • Either no tail or a lizard like tail • Lungs • 3 – chambered heart • 4 limbs • Protein/animal diet • Live primarily on land

  5. Tailed Amphibians • Examples of amphibians with tails as adults are salamanders and newts • Some could have gills their whole lives or develop lungs • Other Features • Many colors • Distasteful chemicals • Slimy mucous • Many found in Appalachian Region of US

  6. Tailless Amphibians Frogs Toads • Smooth, moist skin • Live in or near water • Rough, dry, bumpy skin • May live far from water • Features: • Frogs and toads lay their eggs near water and are fertilized externally • They will eat • Insects, worms, slugs, snails, and other small animals • They use their short, thick flexible tongue to snag their prey • They have maxillaryand vomerine teeth to secure prey • They swallow by blinking their huge bulging eyes, forcing the food back down the esophagus

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