1. Amphibians AHSGE Objective 11

2. -Amphibian Facts • Class Amphibia (double life) • Live part of their lives on land and part in water • Ectothermic vertebrates • 3-Chambered heart • Ex: Frogs, toads, salamanders, newts, caecilians

3. -Amphibian Skin • Smooth and moist • Not water proof • Permeable to liquids and gas • Can absorb oxygen

4. -Amphibian Reproduction • All reproduce sexually • Most frogs and toads use external fertilization, many salamanders and caecilians use internal fertilization • Must lay eggs in water • Eggs are soft and covered in a jelly

5. -Amphibian metamorphosis • Most hatch in water as larvae (tadpoles) • Breath through gills at first • Develop legs and lungs and move to land • Must return to water to reproduce

6. -Amphibian Adaptations • Poison arrow/ dart frogs produce toxins to keep from being eaten • Toads have poison glands on their heads • Some toads are able to survive in the desert

7. Poison Arrow Frog

8. -Amphibian Adaptations • Poison arrow/ dart frogs produce toxins to keep from being eaten • Toads have poison glands on their heads • Some toads are able to survive in the desert

9. Poison glands located right behind the ear.

12. Green Tree Frog

13. Hellbender (mudpuppy)

14. Fire salamder

15. Spotted Salamander

16. Tiger Salamander

17. Tiger Salamander

18. Japanese Giant Salamander • animals-japanese-giant-salamander.htm