1. Class Amphibia Frogs, Toads, Newts, Salamanders and Caecilians By: Annie Ladehoff

2. Key Characteristics  Can live on land and water  Exothermic (cold-blooded)  Have smooth, moist skin  Have a backbone  Have 4 limbs – distinct front and back legs

3. Anatomy  Mouth  Esophagus  Stomach  Gall Bladder  Pancreas  Liver  Small Intestine  Large Intestine  Cloaca  Anus  Lungs  Kidneys  Ureters and Urinary Bladder

4. Digestion  One-Way Digestion  Mouth  Stomach  Intestines  Grabs insects with long, whip like tongue  Adapted to digest prey whole

5. Respiration  Takes in oxygen through the skin  Oxygen goes through bloodstream directly  When on land, amphibians use lungs  Gills are used underwater  Lungs are poorly developed

6. Internal Transport  Three chambered heart  Two atria, one ventricle  Double Circulatory System  Much of the blood in the body collects in the Vena Cava  As tadpoles, Amphibians have a two chambered heart and single-circulatory system  https://www.youtube.com/watch?v=HN0MJoDHc TE https://www.youtube.com/watch?v=HN0MJoDHc TE

7. Excretion  Bladder  Anus  Kidneys filter waste out of blood  Have a cloaca that collects discharge from large intestine, urinary bladder and gonads  Urine may be stored for a short time

8. Response  Well developed brain  Nervous System  Have a third eyelid for on-land protection  Well developed muscular system  Use a variety of colors to blend in to their surroundings

9. Movement  Have webbed feet for swimming  Strong and bony endoskeleton  Rear legs are much stronger than front legs for leaping  Well-developed muscular system  Suction cups on feet for climbing  Some Amphibians have a tail

10. Reproduction  Reproduce sexually  Fertilization occurs outside mothers body  Mother lays eggs coated in jellylike layer  Father immediately fertilizes them  Offspring go through metamorphosis

11. Examples Cane ToadPoison Dart Frog Eastern Newt

12. Examples Fire Salamander Caecilian

13. Facts  There are about 340 species of Salamanders worldwide.  More than 75 percent of frogs and toads live in a tropical rainforest environment.  Amphibians were the first vertebrates to live on land.  One Poison Dart Frog’s venom could kill about 90 people.  The Goliath Frog is the biggest frog in the world, it is 1 ft. long and weighs seven pounds.

14. Sources  http://www.shsu.edu/~bio_mlt/AMPHIBIA.html http://www.shsu.edu/~bio_mlt/AMPHIBIA.html  http://www.preservearticles.com/2011082011052/characteristi cs-of-class-amphibian.html http://www.preservearticles.com/2011082011052/characteristi cs-of-class-amphibian.html  http://www.ask.com/question/general-characteristics-of- amphibians http://www.ask.com/question/general-characteristics-of- amphibians  https://www.teachervision.com/animal- behavior/resource/8700.html https://www.teachervision.com/animal- behavior/resource/8700.html  http://www.mcwdn.org/Animals/Amphibian.html http://www.mcwdn.org/Animals/Amphibian.html  http://ohs- bio.www1.50megs.com/Biology_Notes/Amphibians.htm http://ohs- bio.www1.50megs.com/Biology_Notes/Amphibians.htm  http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files /bio%20102/bio%20102%20lectures/circulatory%20system/circul at.htm http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files /bio%20102/bio%20102%20lectures/circulatory%20system/circul at.htm

15. Sources  https://biologyeoc.wikispaces.com/Amphibians https://biologyeoc.wikispaces.com/Amphibians  http://www.hbwbiology.net/taxonomy-amphibians.htm http://www.hbwbiology.net/taxonomy-amphibians.htm  https://sites.google.com/site/amphibiansjfr/movement https://sites.google.com/site/amphibiansjfr/movement  http://www.dnr.state.md.us/wildlife/Plants_Wildlife/herps/amph ibians.asp http://www.dnr.state.md.us/wildlife/Plants_Wildlife/herps/amph ibians.asp  http://animals.about.com/od/amphibians/tp/amphibiangroup s.htm http://animals.about.com/od/amphibians/tp/amphibiangroup s.htm  http://nationalzoo.si.edu/animals/reptilesamphibians/facts/ http://nationalzoo.si.edu/animals/reptilesamphibians/facts/  http://www.timeforkids.com/news/amazing-amphibians/21431 http://www.timeforkids.com/news/amazing-amphibians/21431  http://www.slideshare.net/kristinfaith858/frog-body-parts-and- functions http://www.slideshare.net/kristinfaith858/frog-body-parts-and- functions  Picture Sources Are Listed HEREHERE