 | Quick Facts |  |
|  | Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
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Class Amphibia
Frogs and Toads (2)
There are about 3900 known species of amphibians. Like reptiles, they are cold-blooded. However, they don't have scales and they go through a larval stage. Their skin is smooth and moist and occasionally has poison glands . Amphibians usually have 4 limbs and often have webbed feet. They have a three-chambered heart and breathe by lungs, gills, or skin either separately or in combination. Their skin limits them to warm, moist climates and they are found in freshwater. There are no true marine species.
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