Amphibians -- Animals
Evolutionary Milestones
Amphibians are the first animal to have legs.
Habitat
Amphibians are completely aquatic as larvae and then become semi-terrestrial as adults.
Anatomical/Structural Features
Amphibians have three chambered hearts as adults, a closed circulatory system, and a well-developed nervous and sensory system. They are cold-blooded, which means their body temperature changes with its environment.
Symmetry
Amphibians have bilateral symmetry.
How They Acquire Nutrients
Amphibians are heterotrophs and can be filter feeders or herbivores as young and then carnivores as adults.
What They Eat
Amphibians can eat invertebrates (such as insects, worms, and slugs), smaller and larval amphibians, small birds, and small mammals.
What Eats Them
Many birds, mammals, reptiles, and larger amphibians can eat amphibians.
Mobility
Amphibians use their legs to move.
Reproduction
Amphibians reproduce sexually through external fertilization.
Development
Amphibians undergo metamorphosis. Their life cycle includes egg, larvae, young adult, adult.
Examples
Some examples of amphibians include frogs, toads, salamanders, and newts.
Other Information
Amphibians exchange gases through their skin.
Amphibians are the first animal to have legs.
Habitat
Amphibians are completely aquatic as larvae and then become semi-terrestrial as adults.
Anatomical/Structural Features
Amphibians have three chambered hearts as adults, a closed circulatory system, and a well-developed nervous and sensory system. They are cold-blooded, which means their body temperature changes with its environment.
Symmetry
Amphibians have bilateral symmetry.
How They Acquire Nutrients
Amphibians are heterotrophs and can be filter feeders or herbivores as young and then carnivores as adults.
What They Eat
Amphibians can eat invertebrates (such as insects, worms, and slugs), smaller and larval amphibians, small birds, and small mammals.
What Eats Them
Many birds, mammals, reptiles, and larger amphibians can eat amphibians.
Mobility
Amphibians use their legs to move.
Reproduction
Amphibians reproduce sexually through external fertilization.
Development
Amphibians undergo metamorphosis. Their life cycle includes egg, larvae, young adult, adult.
Examples
Some examples of amphibians include frogs, toads, salamanders, and newts.
Other Information
Amphibians exchange gases through their skin.