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Amphibians

Amphibians. http://www.youtube.com/watch?v=sfENSyycPQ4&feature=fvw Poison Dart Frog. What is an Amphibian?. ectothermic vertebrate (cold-blooded) means “double life” begin life in water, finish on land lay eggs in the water. http://www.youtube.com/watch?v=B3d48VfQHbY.

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Amphibians

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  1. Amphibians http://www.youtube.com/watch?v=sfENSyycPQ4&feature=fvw Poison Dart Frog

  2. What is an Amphibian? • ectothermic vertebrate (cold-blooded) • means “double life” • begin life in water, finish on land • lay eggs in the water http://www.youtube.com/watch?v=B3d48VfQHbY

  3. Circulatory System • tadpole – 1 loop • adult - 2 loops • 2 atria– upper chambers of the heart • 1 ventricle- lower chamber of heart *they have a 3 chamber heart while we have a 4 chamber heart*

  4. Reproduction • Frogs — external • salamanders – internal • most undergo metamorphosis • http://www.youtube.com/watch?v=aTanXdFVEOw&feature=related • http://www.youtube.com/watch?v=B3d48VfQHbY • http://www.youtube.com/watch?v=aTanXdFVEOw&feature=related

  5. Getting Around • adults have strong skeletons (support) and muscular limbs (movement) • eyes have transparent membranes so they don’t dry out

  6. Frogs and Toads • strong hind legs • webbed feet or toe pads • frogs – smooth, moist skin • toads- dry, bumpy skin

  7. Salamanders • amphibians with tails

  8. Amphibians in Danger • populations decreasing because of: -destruction of habitat -thin skin (absorbs moisture) -eggs with no shells *this makes them VERY sensitive to changes in the environment like poisons and pesticides*

  9. Extra Links • http://www.youtube.com/watch?v=mISMwN-0ggE&NR=1 Amazing Rain Frogs BBC • http://www.youtube.com/watch?v=s_onANXeIPA Huge Cane Toad • http://www.youtube.com/watch?v=M02_dnl9zCA Bull frog calling • http://www.youtube.com/watch?v=aK7AKjrl8Cg&feature=fvw Angry Frog • http://www.youtube.com/watch?v=JzsU2zBIv3A&feature=related Inside frogs throat • http://www.youtube.com/watch?v=VDuvK0u8XyY leopard frog call

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