1. Amphibians Characteristics of Amphians 1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

2. Amphibians Amphibians are vertebrate Characteristics of Amphibians
They are ectothermic
They can live in both aquatic and terrestrial (land) environments
The name amphibian comes from the Ancient Greek word 'amphibios' meaning living a dual life
Moist Skin
Characteristics of Amphibians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

4. Amphibians
In frogs:
eggs hatch and give rise to tadpoles, that have external gills and are mainly vegetarian
As the tadpole grows, internal gills and hind limbs form.
Mouth and tongue enlarge
Lungs form and gills disappear
2chamber heart changes to 3 chamber heart
Front limbs form
Resorption of the tail.
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

6. Amphibians In salamanders: Eggs hatch around thirty days
Gills to breathe underwater
Uses tail for movement
Eat tiny creatures that live in the water
At three weeks legs start to grow. The back legs develop first, followed shortly by front .
Uses both legs and tail for movement.
At 2 months attain adult shape: develop lungs. lose gills, lose tail fin and attain their adult coloring
At two years reach their full adult length, at which point they will return to the water to mate.
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

7. Amphibians Lungs Skin Characteristics of Amphians
Even when the lungs are used, Amphibians can obtain up to 50% of the needed oxygen and let out up to 70% of the carbon dioxide through the skin
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

8. Amphibians Closed circulatory system Characteristics of Amphians
2 chamber heart as tadpole
3 chamber heart as adult
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

10. Amphibians Tail - swim Legs – jump, crawl, run
Webbed feet - swim
Sticky pads on toes - climb
burrowing
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

11. Amphibians Reproduce sexually Both external and internal fertilization
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

12. Amphibians Ah-NOO-ra Characteristics of Amphians 1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

13. Amphibians Ah-NOO-rah Without tail Characteristics of Amphians
Frogs and toads
Make noise to communicate
External fertilization
Amplexus:
Female lays the eggs which are in a jellylike layer.
Male immediately fertilizes them
Limbs used for crawling, running, hopping
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

14. Amphibians Cau-DAY-ta Characteristics of Amphians 1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

15. Amphibians Cau-DAY-ta With tail Characteristics of Amphians
Salamanders, Newts, Waterdogs, Mudpuppies
Internal fertilization
Limbs used for crawling and running
Scent and visual forms of communication
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

16. Amphibians Gym-no-phi-o-na Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona

17. Amphibians Gym-no-phi-o-na Without limbs Characteristics of Amphians
Caecilians
Burrows in soft dirt
Lay eggs/live births
Tentacle
Poor eye sight
Terrestrial/aqutic
Characteristics of Amphians
1. Metamorphosis
2. Obtaining Oxygen
3. Circulatory System
4. Movement
5. Reproduction
B. Types of Amphibians
1. Anura
2. Caudata
3. Gymnophiona