1. There are bewteen 5,000 and 6,000 species of amphibians known today.
2. Amphibians were the first four-limbed vertebrates.
3. Amphibians have simple body structures.
4. Most have life cycles which progress through 3 stages.
5. Amphibians are declining throughout the world.

Amphibians are reliant on water because it is needed for them to survive and their skin releases the water quickly. They are important because the habitat they live in and also we must study them in case of dangerous toxins they release.