4a.+Amphibians

​ Amphibians  Amphibians are interesting creatures. There are about 2500 types of amphibians. They have many ways they can breathe. As a baby tadpole they breathe through gills and live under water. Then they grow limbs their gills disappear and they grow lungs to live on land. Also as adults they absorb oxyegen from the lining of their mouth. They can also breathe through their skin. Amphibians have a long tounge to catch flies and bugs. They are sexual creatures. The female will lay eggs in a clump in the water. There are certain characteristics of an amphibian. Frogs and salamanders have thin, slimy, smooth skin. But, the toad has rough, bumpy and dry skin. An amphibian has a skeleton made of bone. They have a minute brain and a bony skull. Frogs, toads and salamanders are examples of amphibians. Frogs and toads have hinged joints so they can jump very high and far. Amphibians have a three chambered heart which is complex, but not as complex as a bird or mammal's heart. They also need to live near water. If they are away from water to long they will die because they will dry out. All amphibians live near/in pond,creak,stream or all together a moist enviroment. Amphibians have existed over 363 million years dating back to the ichthyostega. ​ 