1. Amphibians SWBAT explain why amphibians are described as having a double life; describe the metamorphosis of the frog; describe the eating habits of a frog; list 3 amphibians other than frogs

2. Amphibian Development Amphibian Amphibian From the Greek, means double life From the Greek, means double life Live in the water when young Live in the water when young Live on land when adults Live on land when adults Ectothermic vertebrates Ectothermic vertebrates Go through metamorphosis Go through metamorphosis

3. Amphibian Development Describe respiration in amphibians. Describe respiration in amphibians. Gills – for breathing in the water in their youth Gills – for breathing in the water in their youth Take in oxygen from water and release carbon dioxide Take in oxygen from water and release carbon dioxide Lungs – for breathing on land as an adult Lungs – for breathing on land as an adult Take in oxygen as a gas and release carbon dioxide Take in oxygen as a gas and release carbon dioxide Skin Skin Can exchange gases through the thin layer of skin Can exchange gases through the thin layer of skin

4. Zoology: The Frog’s Tail How do frogs change during metamorphosis? How do frogs change during metamorphosis? Start out as eggs, laid in bulk in jelly coated masses Start out as eggs, laid in bulk in jelly coated masses They hatch after less than a week, coming out as tadpoles They hatch after less than a week, coming out as tadpoles Long feathery gills Long feathery gills 2 chambered heart 2 chambered heart Hard jaws and lips Hard jaws and lips No proper mouth or tongue. No proper mouth or tongue. Tail Tail

5. Zoology: The Frog’s Tail As it grows, legs develop, the mouth changes and the tongue grows As it grows, legs develop, the mouth changes and the tongue grows Anywhere between 13 days and 3 years the change in complete, depending on the species. Anywhere between 13 days and 3 years the change in complete, depending on the species. 3 chambered heart 3 chambered heart Lungs developed Lungs developed

6. Amphibian Groups List and describe the 2 groups of amphibians. List and describe the 2 groups of amphibians. Tailless amphibians Tailless amphibians Frogs and toads Frogs and toads Hibernate in winter Hibernate in winter Estivate in summer Estivate in summer Tailed amphibians Tailed amphibians Salamanders Salamanders