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Amphibians

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

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Amphibians

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  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 • 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 • Amphibians are vertebrate • 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

  3. 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 • 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.

  4. 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 • 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.

  5. 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 • Lungs • Skin • 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

  6. 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 • Closed circulatory system • 2 chamber heart as tadpole • 3 chamber heart as adult

  7. 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 • Tail - swim • Legs – jump, crawl, run • Webbed feet - swim • Sticky pads on toes - climb • burrowing

  8. 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 • Reproduce sexually • Both external and internal fertilization

  9. 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 • Ah-NOO-ra

  10. 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 • Ah-NOO-rah • Without tail • 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

  11. 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 • Cau-DAY-ta

  12. 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 • Cau-DAY-ta • With tail • Salamanders, Newts, Waterdogs, Mudpuppies • Internal fertilization • Limbs used for crawling and running • Scent and visual forms of communication

  13. 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 • Gym-no-phi-o-na

  14. 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 • Gym-no-phi-o-na • Without limbs • Caecilians • Burrows in soft dirt • Lay eggs/live births • Tentacle • Poor eye sight • Terrestrial/aqutic

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