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12 3 Amphibians
 

12 3 Amphibians

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12 3 Amphibians 12 3 Amphibians Presentation Transcript

  • 12-3 Amphibians
  • Amphibian Camoflauge
    • What is camo good for?
    Hiding from predators Catching food!
  • What is an Amphibian?
    • Examples:
    salamanders frogs toads
  • What is an Amphibian?
    • Vertebrate
    • Ectothermic
    • Spends early life in water
    • Amphibian means:
    • Beginning of life in: ________________
    • Adult life on _________________
    double-life water land
  • What is an amphibian?
    • Reproduction & Development
    • Eggs develop in the water
    salamanders = internal fertilization frogs & toads = external fertilization
  • What is an amphibian?
  • What is an amphibian?
    • Diversity of amphibians
    salamanders Frogs and Toads
    • ___________ fertilization
    • Larvae look like ___________
    • Has tail as an adult?
    • ___________ fertilization
    • Larvae look like ________
    • Has tail as an adult?
    Internal adults yes External tadpoles no
  • Living on Land
    • What is needed to live on land?
    Legs Lungs
  • Living on Land
    • Tadpoles = same system as fish
    • Adult amphibians = 2 loops, 3 chambers
  • Adult Amphibian Heart Atria Atria O 2 in blood Not much O 2 Mixing of blood ventricle to lungs to body
  • Living on Land
    • Movement
      • Strong skeleton
        • Frog jumping
        • Salamander crawling
      • Muscular limbs
  • Amphibians are in Danger
    • Why do you think amphibians are more sensitive to environmental changes?
    • What kind of things do you think can harm amphibians?
    They live in land and water eggs don’t have shells They have thin skin Destruction of habitat (swamps, forests) Pesticides and poisions in their water or air
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