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Amphibians
By Koey Cho
General information
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Kingdom : Animalia
Phylum : Chordata
Class : Amphibia
Examples :
Frog
Salamander
Toad
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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
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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
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