Animals Classes

1. Mammals

1.1. hair and fur

1.2. mammary glands

1.3. four chambered hearts

1.4. sweat glands

1.5. teeth

2. Amphibians

2.1. cold blooded

2.2. skin absorbs moisture

3. Reptiles

3.1. produce eggs

3.2. scales or scutes

3.3. cold blooded

4. Birds

4.1. feathers

4.2. wings

4.3. beaks or bills

4.4. laying eggs

5. Fish

5.1. cold blooded

5.2. most have scales

5.3. breath through gills

5.4. fins