Vertebrates

1. Vertebrates Classifying the Backboned Animals

2. Classifying Vertebrates • Vertebrates can be classified into two groups using this characteristic:

3. Reptiles cold-blooded vertebrate dry, scaly skin lays eggs many have four legs, but some have none strong, waterproof skin breathes with lungs can live in many environments, both dry and wet

4. Amphibians frog breathe through lungs, skin, and gills during different parts of life vertebrate most have 4 legs toad life cycle includes larva stage (tadpoles) salamander cold-blooded moist skin All amphibians live near water so their skin won’t dry out. Frogs spend half their lives in water and half on land. lays eggs; usually in a jelly-like mass in water

5. cold-blooded vertebrate Fish covered by scales some species only live in freshwater (rivers, lakes) and some only live in saltwater (ocean) lays eggs in water eyes usually on side of head life cycle includes larva stage breathes through gills have fins and streamlined bodies to help them glide through water

6. warm-blooded Birds vertebrate have waterproof feathers live on land; found in all environments lay hard-shelled eggs hollow bones allow birds to fly breathe with lungs and have air sacs not all birds can fly all birds have wings and beaks

7. Mammals warm-blooded vertebrate most have body hair or fur breathe through lungs large, well-developed brains most live on land reproduce by live birth nurse their young with milk different kinds of teeth for eating different foods