Presentation on theme: "Classifying the Backboned Animals Vertebrates. Classifying Vertebrates Vertebrates can be classified into two groups using this characteristic: Cold-bloodedWarm-blooded."— Presentation transcript:
Classifying the Backboned Animals Vertebrates
Classifying Vertebrates Vertebrates can be classified into two groups using this characteristic: Cold-bloodedWarm-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).
Reptiles cold-blooded vertebrate dry, scaly skin lays eggs breathes with lungs many have four legs, but some have none strong, waterproof skin can live in many environments, both dry and wet
Amphibians vertebrate cold-bloodedmoist 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 breathe through lungs, skin, and gills during different parts of life most have 4 legs life cycle includes larva stage (tadpoles) frog toad salamander
Fish vertebratecold-blooded covered by scales some species only live in freshwater (rivers, lakes) and some only live in saltwater (ocean) lays eggs in water breathes through gills have fins and streamlined bodies to help them glide through water eyes usually on side of head life cycle includes larva stage
Birds vertebrate warm-blooded have waterproof feathers live on land; found in all environments lay hard-shelled eggs breathe with lungs and have air sacs all birds have wings and beaks hollow bones allow birds to fly not all birds can fly
Mammals vertebrate warm-blooded most have body hair or fur most live on land reproduce by live birth breathe through lungs nurse their young with milk large, well-developed brains different kinds of teeth for eating different foods