Amphibians

=A ﻿ll About Amphibians =

= Article: = = Snow Frogs in the French Alps National Geographic = @http://ngm.nationalgeographic.com/2011/04/snow-frogs/white-text

= Pictures: =

Amphibians This is a frog named Eastern Sedge Frog

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Blue Poison Dart Frog

http://www.flickr.com/photos/ucumari/863842911/

Newt []



Atelopus Harlequin Frog []

Dendrobatidae Poison Frog []

= Notes: =

Amphibians: Evolution from water to land
Amphibian Characteristics Body Structure Body Function Reproduction Metamorphosis Amphibian Taxonomy Order: Caudata Order: Caecilia Order: Anura
 * Amphibian: means “double life”
 * Live in water and on land
 * Amphibians are a link between fish and reptiles
 * Believed to have evolved from the lobe fined fish
 * Legs (tetrapods)
 * Moist skin
 * Primintive lungs and diffusion through skin for respiration
 * Gills as tadpoles
 * Three-chambered heart
 * Ectotherms (cold blooded)
 * Body temperature changes with the environment
 * External fertilization
 * External development in aquatic eggs
 * Must return to water to lay eggs!!!
 * Eggs
 * Tadpole Stages
 * Adult
 * Lose Gills, lose tail, and grow legs
 * Kingdom: Animalia
 * Phylum: Chordata
 * Subphylum: Vertebrata
 * Class: Amphibia
 * Orders: Caudata, Anura, Caecila
 * Salamanders
 * Amphivians with tails, smooth skin
 * Examples:
 * Newts are salamanders that live only in water
 * Mudpuppy- largest local salamander (2 feet)
 * Japanese Hellbender- largest in the world (5 feet)
 * Limbless amphibians
 * Live in tropical climates
 * Usually blind
 * Ex. Caecilians
 * General Information
 * Some are poisonous
 * Vocal cords produce sounds for mating
 * Frogs are more aquatic and toads are more terrestrial

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