FROGS: Need to live near water Have 2 bulging eyes Strong, long, webbed hind feet that are adapted for leaping and swimming Strong and slimy skin (like very moist environments) Will take long jumps Like to lay eggs in clusters Found on every continent except Antarctica More than 400 species Have a lot of PREDATORS
TOADS Can live further away from water Lower, football-shaped eyes Stubby bodies with short hind legs (for walking instead of hopping) Warty and drier skin Lay eggs in long chains Will run or take small hops Can be found worldwide except for Madagascar, the polar regions, and Polynesia More than 300 species Do NOT have a lot of predators
Amphibian Reproduction Salamanders – eggs are fertilized internally Frogs and toads –eggs are fertilized externally For all amphibians, Fertilized eggs develop in water What is special about amphibian eggs is that they have a protective jelly that coats the egg
Stage 5: Front legs develop but frog still has tail
Stage 6: Frog loses tail and becomes a mature adult
Amphibians: ADAPTATIONS What is an adaptation? Once amphibians are adults, what new adaptations do they need to live on land ?
Adaptation 1: OXYGEN While amphibians are larvae, (exampletadpoles), how do they breathe?
Once, they are on land, how do they breathe? Amphibians must get oxygen from the AIR instead of the water once they are on land During metamorphoses, amphibians lose their gills and develop LUNGS. What two gases are exchanged through the lungs? OXYGEN and CARBON DIOXIDE