Presentation on theme: "Classifying the Backboned Animals"— Presentation transcript:
1Classifying the Backboned Animals VertebratesClassifying the Backboned Animals
2Classifying Vertebrates Vertebrates can be classified into two groups using this characteristic:Cold-bloodedWarm-bloodedThese 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).
3Reptiles cold-blooded vertebrate dry, scaly skin lays eggs many have fourlegs, but somehave nonestrong,waterproofskinbreathes with lungscan live in many environments, both dry and wet
4Amphibians frog breathe through lungs, skin, and gills during different parts of lifevertebratemost have 4 legstoadlife cycle includes larva stage (tadpoles)salamandercold-bloodedmoist skinAll amphibians live near waterso their skin won’t dry out.Frogs spend half their lives inwater and half on land.lays eggs; usually in a jelly-like mass in water
5Fish cold-blooded vertebrate covered by scales some species only live in freshwater (rivers,lakes) and some onlylive in saltwater (ocean)lays eggs in watereyes usually on sideof headlife cycle includes larva stagebreathes through gillshave fins and streamlined bodies to help themglide through water
6Birds warm-blooded vertebrate have waterproof feathers live on land; found in allenvironmentslay hard-shelled eggshollow bones allow birds to flybreathewith lungsand haveair sacsnot all birdscan flyall birds have wings and beaks
7Mammals warm-blooded vertebrate most have body hair or fur breathe throughlungslarge,well-developedbrainsmost live on landreproduce by live birthnurse their young with milkdifferent kinds of teethfor eating different foods