1. Amphibians

2. Amphibians (“both ways of life”):
Tadpoles born in water/Adults terrestrial (metamorphosis)
Moist Thin skin
Webbed feet
Gills, lungs and skin for respiration
Water required for reproduction
Usually external, some carry eggs, few carry embryos
Very susceptible to water and air pollution
Frogs and Salamanders

3. Respiration Larvae: Both skin and gills
Adults: Both skin (cutaneous) and lungs (pulmonary)
Positive pressure breathing

4. Lung capillaries
Gill capillaries
Lung and skin capillaries

5. Digestion
Complete digestive tract Mouth, esophagus, stomach, small and large intestine. Accessory: Pancreas and Liver