animal+overview

ANIMALS OVERVIEW

All animals are multicellular heteroph. Animals are eukaryotes. Their cell walls lack the chlorplasts that let photosynethic organisms make teir own food. Invertebrates: are animals without backbones

Vertebrates: are animals with backbones Porifera, Cnidaria (4 classes),- sponges and cindarians Ctenophora, Platyhelminthes (3 classes),- comb jellies and flat worms Mollusca (3 classes), - land snails to marnine octopuses Annelida (3 classes)- segmented worms Nematoda, Echinodermata (5 classes) all of the species look very similar Arthropoda (4 subphyla & 3 classes) – species look very different from each other Chordata (3 subphyla & 8 classes) –