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AMPHIBIANS. Ms. Bridgeland 5 th Grade. Are Amphibians a CLASS or a PHYLYM?. Amphibians : one of the 5 classes of Vertebrates Reminder: What are the other 4 classes of Vertebrates?. Objective : Describe amphibian characteristics and examine how adult amphibians are adapted for life on land. .

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Ms. Bridgeland

5th Grade

amphibians one of the 5 classes of vertebrates reminder what are the other 4 classes of vertebrates
Amphibians: one of the 5 classes of VertebratesReminder: What are the other 4 classes of Vertebrates?

Objective: Describe amphibian characteristics and examine how adult amphibians are adapted for life on land.

amphibian double life
Amphibian: “Double – life”
  • They begin their lives in water and spend their adulthood on land
  • To reproduce (have babies), they return to water
2 major groups of amphibians
2 Major Groups of Amphibians
  • Salamanders:
  • Frogs/Toads:
how can you tell the difference between salamanders and frogs toads
How can you tell the difference between salamanders and frogs/toads?
  • Salamanders have a tail even when they are adults
  • Frog/toads lose their tails before they become adults
  • 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
  • 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
Amphibian Reproduction
  • 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 instead of a shell
how amphibians reproduce
How Amphibians Reproduce

There are 6 stages in the life cycle of an Amphibian: Here is what a frog looks like in some of the stages

stage 2 fertilized eggs
Stage 2: Fertilized Eggs
  • Male frogs fertilize the eggs, which lie in water for a few days
stage 3 larvae
Stage 3: Larvae
  • After a few days, larvae wriggle out of a jelly that coats the egg and begin a free-swimming, fishlike life
  • Larvae of a frog or toad is called a _________
  • A process where an animal develops after birth or hatching, involving a sudden change in the animal’s structure