Amphibians such as frogs, toads, and salamanders spend their early life in water and their adult life on land. They have adaptations like camouflage, legs, and lungs that allow them to live on both land and water. However, amphibians are sensitive to environmental changes and facing threats due to habitat loss, pollution, and other factors.

1. 12-3 Amphibians

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

3. What is an Amphibian? Examples: salamanders frogs toads

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

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

6. What is an amphibian?

7. 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

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

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

10. Adult Amphibian Heart Atria Atria O 2 in blood Not much O 2 Mixing of blood ventricle to lungs to body

11. Living on Land Movement Strong skeleton Frog jumping Salamander crawling Muscular limbs

12. 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