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Amphibians…”double-life”

Amphibians…”double-life”. Arizona Tree Frog. Rough-skinned Newt. Caecilian. Let’s Review: Common Vertebrate Characteristics. Backbone Bilateral Symmetry Endoskeleton, with a body cavity Closed circulatory systems Complex, advanced nervous systems…we have brains!

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Amphibians…”double-life”

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  1. Amphibians…”double-life” Arizona Tree Frog Rough-skinned Newt Caecilian

  2. Let’s Review:Common Vertebrate Characteristics • Backbone • Bilateral Symmetry • Endoskeleton, with a body cavity • Closed circulatory systems • Complex, advanced nervous systems…we have brains! • Efficient respiratory systems • Either ectothermic or endothermic

  3. Thin, moist skin 4 legs Ectothermic: (Body temperature changes with that of its environment) Interesting Info: Species will become dormant if it is too hot or too cold!!! Live in the water at birth, then develop a terrestrial environments as adults. Metamorphosis: A chemically controlled change in body structure; occurs from young to adult stage. Ex: eggs...tadpoles…frog General Characteristics of Amphibians

  4. Respiration • Respiration • Lungs as adults • Gills as juveniles • Their moist skin allows oxygen to pass through and be used by the body. • Need to live in/near a moist environment

  5. Circulation and Reproduction • Circulation: • Closed system consisting of a 3-chambered heart. • Reproduction: • Sexual • Use water for reproduction • External fertilizers

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