View
854
Download
1
Category
Tags:
Preview:
Citation preview
Vertebrates
Amphibians
CharacteristicsBreathe
Lungs and skin
Skin
Thin; must stay moist
Absorb water and oxygen
Eggs
Must stay in water; young live in water
Double-loop circulatory system3-chambered heart!
Why is the double-loop system more efficient than the single-loop system of the fish?
“Double-life” Metamorphosis
Tadpole with tail and gills becomes adult without tail and gillsAdults have lungs to get oxygen
First vertebrates on land…3 Groups
Frogs & toads
SalamandersCaecilians
How are frogs and toads similar?
How are frogs and toads different?
Warm up
How is the frog’s skin like a lung?
What does it mean that amphibians are ectothermic?
Recommended