1. Amphibians Class Amphibia

2. AMPHIBIANS Amphibians begin life in water. They start out as tadpoles and breathe with gills As they grow, they develop lungs and legs They move to land as adults Amphibians move back to water to lay eggs.

3. Amphibians LIVE ON LAND BUT STAY NEAR THE WATER Chinese Giant Salamander

4. Adaptations Mobile, muscular tongue allows amphibians to capture and manipulate food.

5. Adaptations Breathe through the skin or with the use of gills or lungs

6. Amphibians return to the water to lay eggs. Eggs do not have shells

7. Strategies to keep eggs wet: Laying eggs directly in water Laying eggs on moist ground Wrapping eggs in leaves

8. Pygmy Marsupial Frog Flectonotus pygmaeus

9. Tadpoles Some frogs start as tadpoles Have gills and a broad-finned tail

11. Tadpole into Adult Frog Gills are reabsorbed and lungs develop Circulatory system is reorganized to send blood to the lungs Tail fin is reabsorbed

12. Tadpole into Adult Frog Body grows limbs and completely reorganizes its skeleton, muscles, and parts of the nervous system. Digestive system is rebuilt to handle a carnivorous diet.

14. Amphibians Salamanders Frogs

15. Salamanders More than 300 species Long body Four walking limbs tail

16. Frogs Over 3000 species Largest group of living amphibians

17. Adult Frogs Tailless bodies Long, muscular hind limbs Webbed feet Exposed eardrums Bulging eyes

18. Adult Frogs Bodies adapted for jumping –Elongated bones in their hips, legs and feet for increased speed and power –Hind legs have fused bones that absorb the shock of landing

19. Toads One family of frogs Rougher, bumpier skin Shorter legs- not good jumpers Glands make toxins that protect them from predators – also in tropical frogs

20. Frogs Live in every environment on Earth except at the poles and the driest deserts.