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Amphibians By Koey Cho General information • • • • Kingdom : Animalia Phylum : Chordata Class : Amphibia Examples : Frog Salamander Toad • • • • • • Have 4 legs Adapt to both aquatic & land environments Pokilotherms Have moist, scaleless skin Carry out external fertilization Breathing : larvae by gills adults by moist skin & lungs Body structure Special characteristics of skin • Wet, scaleless skin which is permeable to water • Various colour &patterns • Mucous glands and poison glands are present. • Breathing 1. larvae gills • 2. adults lungs and moist skin Reprodution •Carry out external fertilization •Lay eggs without shells •Eggs are laid in water • Non-shelled egg Life cycle Evolution • Amphibians are evolved from fish Amphibians vs reptiles Amphibians Reptiles Gills & lungs Lungs Shelled eggs Fertilization Non-shelled eggs Moist, scaless skin External Examples Frog, toad Lizard, snake Methods of breathing Eggs Skin texture Dry, scaly skin Internal Reference • • • • • • • • • • • • • http://www.thefrog.org/biology/temperature/temperatue.htm http://www.scribd.com/doc/11337901/The-Evolution-of-Amphibians http://library.thinkquest.org/27885/amphi_ev.htm http://en.wikipedia.org/wiki/Amphibian http://news.nationalgeographic.com/news/2007/08/images/070830-poisonfrog.jpg http://crazy-aboutbooks.com/yahoo_site_admin/assets/images/image007.93133449_std.jpg http://www.transtutors.com/Uploadfile/CMS_Images/13907_V-S-Skin-offrog.JPG http://wanderingowloutside.files.wordpress.com/2010/02/frog-life-cycle.jpg http://www.saburchill.com/images02/020107041.jpg http://4.bp.blogspot.com/_nvWgMkmFQCE/SYe28SKhkLI/AAAAAAAACWQ /lbLYzHczvAU/s400/Amphibian+evolution.jpg http://www.k12sciencestore.com/support/dissectionworks/pictures/frog/label/ nervous_system_l.gi http://www.diffen.com/difference/Amphibian_vs_Reptile http://cdn.webecoist.com/wp-content/uploads/2009/07/Amazing-Reptileand-Amphibian-Anamolies1.jpg END