Amphibians

=Amphibians=

Information
Austin did all the information

__Amphibian Characteristics__
__-Amphibian: means "double life"__ __-Live in water and on land__ __-Amphibians are a link between fish and reptiles__ __-Believed to have evolved fro the finned fish__

__Body structure__
__-Legs(tetrapod)__ __-Moist skin__

__Body function__
__-Primitive lungs and diffusion through skin for respiration__ __-Gills as tadpoles__ __-Three chambered heart__ __-Ectotherms (cold-blooded)__ __-Body temperature changes with the environment__

__Reproduction__
__-External fertilization__ __-External development__ __-Must return to water to lay eggs!!!__

__Metamorphosis__
__-Egg__ __-Tadpole__ __-Adult__ __-Lose gills and tail, grow legs__

__Amphibian Taxonomy__
__-Kingdom Animalia__ __-Phylum Chordata__ __-Subphylum Vertebrata__ __-Class Amphibia__ __-Orders: Caudata, Anura, Caecilia__

__Order Caudata__
__-Salamanders__ __-Amphibians with tails and smooth skin__ __-Examples__ __-Newts are salamanders that live only in water__ __- Mudpuppy- largest local salamander__ __-Japanese Hellbender- largest in world__

__Order Caecilia__
__-Limbless amphibians__ __-Live in tropical climates__ __-Usually blind__

__Order Anura__
__-General Info__ __-Some are poisonous__ __-Vocal cords produce sounds for mating__ __-Frogs (more aquatic)__ __-Toads (more terrestrial)__

Video;

<embed src="[]" flashVars="slug=frog_greentree_lifecycle&img=http://video.nationalgeographic.com/video/player/media/frog_greentree_lifecycle/frog_greentree_lifecycle_480x360.jpg&vtitle=Red-Eyed%20Tree%20Frog's%20Life%20Cycle&caption=A%20momma%20tree%20frog%20won't%20settle%20for%20just%20any%20location%20for%20her%20eggs.%20&permalink=http://video.nationalgeographic.com/video/player/animals/amphibians-animals/frogs-and-toads/frog_greentree_lifecycle.html&share=true" name="flashObj" width="460" height="321" seamlesstabbing="false" allowfullscreen="true" type="application/x-shockwave-flash" pluginspage="[]>// //Summer did the video//

Pictures

//The **American Bullfrog** (//**Rana catesbeiana**//)[|[][|1][|]][|[][|2][|]][|[][|3][|]]), often simply known as the **Bullfrog** in Canada and the United States, is an aquatic [|frog], a member of the family [|Ranidae], or “true frogs”, native to much of [|North America].[|[][|4][|]] This is a frog of larger, permanent water bodies, swamps, ponds, lakes, where it is usually found along the water's edge.[|[][|5][|]] On rainy nights, bullfrogs along with many other amphibians, go overland and may be seen in numbers on country roads//

//The **American Toad** (//**Bufo americanus**//) is a common species of [|toad] found throughout the eastern [|United States] and [|Canada]. It is divided into three subspecies—the **Eastern American Toad** (//B. a. americanus//), the **Dwarf American Toad** (//B. a. charlesmithi//), and the rare **Hudson Bay Toad** (//B. a. copei//). Miki did the pictures there was 5 but the other 3 didnt come up when we posted this page

Article: [] Amphibians Austin did the article