Amphibians

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 * Amphibian characteristics
 * Amphibian means "Double Life."
 * Live on land and in water.
 * Amphibians are believed to between fish and Reptiles.
 * Believed to have evloved fromtheLobe-finned fish.
 * Body structure
 * Legs (tetrapods)
 * Moist skin
 * Body function
 * Primitive lungs and diffusion through skin for respiration
 * Gills as tadpoles
 * three- chambered heart.
 * Ectotherms
 * Body temperature changes with the enviroment.
 * Reproduction
 * external fertilization
 * external development in aquatic egg.
 * Must return to water to lay eggs!!!
 * Metamorphosis
 * egg
 * Tadpole
 * Adult
 * Lose Gills
 * Lose tail
 * Gain legs.
 * Amphibian Taxonomy
 * Kingdom Animillia
 * Phylum Chordata
 * Subphylum Verterbrea
 * Class Amphibia
 * Orders: Caudata, Anura, Caecilia.
 * Order







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Frogs and toads, salamanders and newts, wormlike (and little-known) caecilians—these are the class Amphibia: cold-blooded, creeping, hopping, burrowing creatures of fairy tale, biblical plague, proverb, and witchcraft. Medieval Europe saw frogs as the devil; for ancient Egyptians they symbolized life and fertility; and for children through the ages they have been a slippery introduction to the natural world. To scientists they represent an order that has weathered over 300 million years to evolve into more than 6,000 singular species, as beautiful, diverse—and imperiled—as anything that walks, or hops, the Earth.

1. What are amphibians? 2. What is an example of of an amphibian? 3. What do you think is the greatest feature of an amphibian?