12-3 Amphibians

Amphibian Camoflauge What is camo good for? Hiding from predators Catching food!

What is camo good for?

What is an Amphibian? Examples: salamanders frogs toads

Examples:

What is an Amphibian? Vertebrate Ectothermic Spends early life in water Amphibian means: Beginning of life in: ________________ Adult life on _________________ double-life water land

Vertebrate

Ectothermic

Spends early life in water

Amphibian means:

Beginning of life in: ________________

Adult life on _________________

What is an amphibian? Reproduction & Development Eggs develop in the water salamanders = internal fertilization frogs & toads = external fertilization

Reproduction & Development

Eggs develop in the water

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

Diversity of amphibians

___________ fertilization

Larvae look like ___________

Has tail as an adult?

___________ fertilization

Larvae look like ________

Has tail as an adult?

Living on Land What is needed to live on land? Legs Lungs

What is needed to live on land?

Living on Land Tadpoles = same system as fish Adult amphibians = 2 loops, 3 chambers

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

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

Why do you think amphibians are more sensitive to environmental changes?

What kind of things do you think can harm amphibians?