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