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Amphibian ADAPTATIONS

Amphibian ADAPTATIONS. Ms. Bridgeland 5 th Grade. Stage 1 : Adult frogs. Stage 2 : Frogs lay eggs in water, which then are fertilized. . *How are Amphibian Eggs different from other eggs? -They do NOT have a shell, but instead a jelly-like protective coating.

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Amphibian ADAPTATIONS

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  1. Amphibian ADAPTATIONS Ms. Bridgeland 5th Grade

  2. Stage 1: Adult frogs

  3. Stage 2: Frogs lay eggs in water, which then are fertilized.

  4. *How are Amphibian Eggs different from other eggs? -They do NOT have a shell, but instead a jelly-like protective coating

  5. Stage 3: Larvae • After a few days, larvae wriggle out of the protective jelly that coats the egg and begin a free-swimming, fishlike life • The larvae of a frog or toad is called tadpole.

  6. As they grow, larvae undergo a ______________________?

  7. Metamorphosis • A process where an animal develops after birth or hatching, involving a sudden change in the animal’s structure

  8. Stage 4: Larvae develops hind (back) legs

  9. Stage 5: Front legs develop

  10. Stage 6: Frog loses tail and becomes a mature adult

  11. Amphibians: ADAPTATIONS • What is an adaptation? • Once amphibians are adults, what new adaptations do they need to live on land?

  12. Adaptation: OXYGEN • While amphibians are larvae, (example tadpoles), how do they breathe?

  13. Once, they are on land, how do they breathe? • Amphibians must get oxygen from the AIR instead of the water once they are on land • During metamorphoses, amphibians lose their gills and develop LUNGS. • What two gases are exchanged through the lungs? • OXYGEN and CARBON DIOXIDE

  14. Adaptation: Circulatory System • A tadpole’s circulatory system is similar to a fish: it has a single loop and a heart with 2 chambers • Adult amphibians have two loops and a heart with three chambers. • Atria: upper chamber of the heart that receives blood. • Ventricle: the lower chamber where oxygen rich and oxygen-poor blood mixes • –blood moves from the atria to this lower chamber

  15. Far left = fish circulatory systemMiddle = amphibian circulatory system

  16. Adaptation: Movement • Some frogs have sticky pads on their toes to climb trees • Others have webbed feet for swimming

  17. Adaptation: Obtaining Food • Tadpoles are HERBIVORES (only eat plants • Adult salamanders, frogs, and toads are CARNIVORES • Frogs and toadsWAIT for their prey • SalamandersAMBUSH their prey (chase after their prey)

  18. Adaptation: Body Structure • Adult amphibians are vertebrates and have strong skeletons to support their body against the pull of gravity

  19. What are two reasons that amphibians might become endangered? • Destruction of their habitats= when a swamp is filled in or a forest is cut, an area that was moist, or more wet, becomes drier. Most amphibians cannot live in dry, sunny areas. • Pollution = pollution in water (pesticides and chemicals damage the skin and eggs of amphibians)

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