1. AMPHIBIANS

2. What is an amphibian? Vertebrate Leads a “double life” Moist skin Metamorphosis

3. Evolution of Amphibians Bones became stronger Many have lungs to breath air Limbs to walk on land

4. History Carboniferous Period = Age of Amphibians Only 3 groups survive today - salamanders, frogs, and caecilians

5. Feeding Larva (tadpoles) are usually herbivores Adults are usually carnivores

6. Respiration Larva (tadpoles) breath with gills Adult frogs have lungs Some amphibians keep gills all their life, mudpuppy

7. Circulation Heart is a double loop, with 3 chambers and a ventricle that is partly divided

9. Reproduction Frogs lay eggs, fertilization is external Larva are aquatic

10. METAMORPHOSIS Series of changes that occur as an organism grows

11. Amphibian Groups Kingdom Animalia Phylum Chordata Subphylum Vertebrata Class Amphibia Order Urodela Order Anura Order Apoda

12. See videos at http://video.nationalgeographic.c om/video/player/animals/index.ht ml