1. Amphibians

2. 1. Amphibians Cold –blooded (Less active in cold temperatures)
Undergo a metamorphosis to change from a gilled aquatic organism to an air breathing organism
Two types: tailless and tailed

3. 2. Changes (Young to Old) Gills to lungs (also breathe through skin)
2 chamber to 3 chamber heart
Growth of two limbs
Loss of tail (Resorb)

4. 3. Frogs vs Toads
Frogs have smooth moist skin while toads have rough dry bumpy skin
Both lay eggs in water (or moist area)
Frogs often hibernate (winter); toads often estivate (hot, dry)

5. Frogs

6. Toads

7. 4. Frog Feasting

8. 4. Frog Feasting Basically eat anything they can get into their mouths
Catch food with their tongues
Teeth – not for chewing, but to keep live insects in the mouth (maxillary & vomerine teeth)
Swallow by blinking eyes

9. Maxillary & Vomerine Teeth

10. Frog Tongues

11. 5. Salamanders & Newts Tailed amphibians Gills to lungs
Breathe through skin
Secrete substances to deter predators