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Classifying the Backboned Animals

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Presentation on theme: "Classifying the Backboned Animals"— Presentation transcript:

1 Classifying the Backboned Animals
Vertebrates Classifying the Backboned Animals

2 Classifying Vertebrates
Vertebrates can be classified into two groups using this characteristic: Cold-blooded Warm-blooded These animals get heat from outside their bodies. The body temperature changes with the temperature of its surroundings. **If the outside temps change, so does its body temperature. **Cold air temperature means cold body temperature. The body temperature does not change much. They use energy from food to keep a constant temperature. **If body temp changes much, this could mean sickness (like a fever for humans).

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 Fish cold-blooded vertebrate 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 Birds warm-blooded 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

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