1. By: Josh Armstrong and Brandon Lennert
Amphibians
By: Josh Armstrong and Brandon Lennert

2. Amphibians Kingdom: Animalia Phylum: Chordata Sub-Phylum: Vertebrates
Class: Amphibians

3. Aquatic ties Larvae Gills Tails Herbivores Moist skin
Will suffocate if Co2 can’t be disposed of
Adult
Must lay eggs in H2o
Lack outer shell

4. Terrestrial ties Adults Lungs + moist skin Legs Carnivores
More efficient heart

5. Evolution of amphibians
360 million years ago
Evolved from lobed fin fish
Bones in pectoral region (Forearms)
Pelvic fins (Hind legs)
Leg bones strong
Support body weight

6. Traits of Amphibian class
Metamorphosis- Change form (Aquatic Larvae -> Terrestrial Adult)
Cold blooded- Ectoderms (Use environment to regulate heat)
External fertilization
Need H2o
No shells
Jelly crated eggs
Feet if present, lack claws and are often webbed
Moist porpoise skin
Respiration (In O2 and H2o, Out Co2 and H2o)

7. Traits of amphibian class (Continued)
Respire
Gills
Lungs
Skin
?v=bHwAguHqYnU

8. Three orders (Anura)
Means: Tailless
3800 species of frogs and toads
Lay jelly coated eggs in H2o
Tadpoles- Compact bodies
Tongue sticky, long

9. Three orders (Urodela)
400 different species
Salamanders and Newts
Long tails
Elongated bodies
Moist Skin
Four limbs
Found almost worldwide

10. Three orders (Apoda or Gymnophiona)
Leg less amphibians
160 species
Caecilians
Can be up to 12 inches long
Lives in tropics and in dirt/soil
Eats insects

11. Life of a frog Larvae Small with fish like traits
Tail, gills , no limbs, …, ect.
Adult
Bigger with no fish like taits
Forelimbs, hind limbs, lungs, …, ect.
ians/AmphibianGame_1.html

12. External Covering Moist skin Why?!? Used for protection
slippery easier to escape
Respiration
Takes in oxygen
Releases carbon dioxide

13. Nervous System Brain same size as a fish No care process for young
Very good vision
Nictitating membrane
Goggles underwater
Also keeps eyes moist
games/amphibian-games/frog-games/sc_letterfall_frog.html

14. Nervous system continued
Tympanic Membrane
Picks up vibrations in water
No ears
Nares
For smell
Internal and external

15. Internal Structures Endoskeleton Adaptations Radius, ulna are fused
Tibia and fibula are fused
the beginning of joints

16. Digestive System Larvae are herbivores Adults are carnivores
mal_and_nature_games/amphibian- games/frog-games/frog-jigsaw.html

17. Digestion Continued from beginning to end
Mouth- 2 types of teeth, forcing it to gullet
Pharynx- opening from mouth to gullet
Gullet- opening to esophagus
Esophagus- moves food to stomach
Stomach- starts protein digestion

18. Digestion continued Small intestine No pyloric caeca
Protein, lipid, and carb digestion
Large intestine
No digestion
Food molecules absorbed into blood
Cloaca
Urogenital and digestion into one

19. Digestion continued Vent Similar to anus (Everything exits)

20. Circulatory system Larvae Adult 1 loop system 2 chambers 2 loop system
3 chambered heart

21. Respiratory system 2 types Respire through moist skin
Mouth-glottis- trachea lungs
Take in O2 and release Co2

22. Excretory system Kidneys Waste
2 lie along back wall of frog, under reproductive organs
Blood into kidney
Kidney filters out nitrogenous waste
Waste
Urea, salts and H20 (urine) stored in urinary bladder

23. Reproductive System (Male)
Sperm made in testes
Travels through sperm ducts to cloaca
Exits out vent

24. Reproductive system (Female)
Eggs made in ovaries
Travels along oviduct where jelly coating is applied
Eggs empty out into cloaca and exit out vent

25. Frog life cycle Embryonic development Fertilization Fertilized egg
Cleavage
Yolk plug
Neutral fold
Organ formation

26. Frog life cycle continued
Larval development
Hatching
External gill
Operculum
Hind legs
Fore legs
Tail resorption

27. Frog life cycle continued
Adults (Metamorphosis)
Legs form
Mouth broadens
Develops teeth and jaws
Lungs become functional
Circulatory system becomes 2-loops, 3 chambered heart
Terrestrial and aquatic

28. Mating During warm spring frogs emerge from hibernation
Migrate to ponds/ moist areas
Males, which have vocal sacs, call to attract females of their own species
Females respond to call
Male climbs on the back of female and amplexus occurs forcing female to pass mature eggs
Male disperses sperm into water near the eggs
mes/amphibian-games/frog-games/frog-word-o-rama.html

29. Amphibian fun facts
Hundreds of millions of years ago, amphibians became the first vertebrates to live on land.
Some turtles and tortoises, including the Eastern box turtle, can live for more than a century.
More than 75 percent of all toad and frog species in the world live in tropical rainforests.
The word amphibian means “Double life”
-games/frog-games/sc_spelling_frog.html

30. Work citied https://www.youtube.com/watch?v=qp0PdRrpSzA
(funny video)
(dissection)
(difference in reptile and amphibians)
"Amphibians." Facts. N.p., n.d. Web. 08 Jan
"Amphibian Quiz." Amphibian Quiz. N.p., n.d. Web. 08 Jan
 "Amphibian Quiz." Amphibian Quiz. N.p., n.d. Web. 08 Jan