Vertebrates Invertebrates Classification of Animals Vertebrates Invertebrates Vertebrates

Vertebrates & Invertebrates

Classification of Animals Vertebrates Invertebrates

Vertebrates • Animals that are vertebrates are simply animals with a backbone. • Vertebrates have an endoskeleton –It offers support and protects the soft parts of the animal.

Vertebrates can either be ectotherms or endotherms. Ectotherms (cold-blooded) • Body temperature changes to match their surroundings. • Endotherms (warm-blooded) • Regulate their body temperature so that it remains constant

Vertebrates • Vertebrate animals fall into the chordate phylum. • The chordate phylum is divided into classes. –fish –amphibians –reptiles –birds –mammals

Vertebrates This chart shows the vertebrates organized into classes. ! Vertebrates Fish Amphibians Birds Reptiles Mammals

Invertebrates • Invertebrates are animals without a backbone. • 97% of all animals are invertebrates! • They are divided into different groups or phyla (plural of phylums). • Scientists look at something called symmetry to help classify invertebrates.

Invertebrates Radial symmetry: body parts are arranged around in a circle around a central point (sea star). Bilateral symmetry: have two sides that will match if you draw a line down the center of their body (lobster). Asymetric: these animals have no definite shape at all (sponges).

Invertebrates Cnidarian Sponges Arthropods Invertebrates Echinoderms Annelids Flatworms Mollusks