Kingdom Animalia

Characteristics Eukaryotic organisms Multicellular No cell walls Heterotrophs (consumers)

Characteristics Specialized tissues for impulses and movement (nervous system) Movement relates to ability to find food Most develop from Zygotes

Body Plans - Symmetry Animals that are irregular in shape are asymmetrical Animals that are regular in shape are symmetrical

Symmetry An animal has radial symmetry if it can be divided along any plane, through a central axis, into even halves An animal has bilateral symmetry if it can be divided down it's length into similar right and left halves

Bilateral Symmetry Those with Bilateral Symmetry have: Dorsal (top) Ventral (bottom) Anterior (front) Posterior (back)

Invertebrates 8 main Phyla No backbones 95% of all animals belong to this group

Phylum Porifera Examples: Tube Sponge, Glass Sponge, Sea Sponge

Phylum Porifera Approx. 5 000 species Sessile (immobile) Asymmetrical No mouth or digestive cavity Marine or fresh water

Phylum Cnidaria Examples: Jellyfish, Hydra, Sea anemones, and corals

Phylum Cnidaria Approx. 10 000 species Sessile or motile Medusoid (jellyfish) or polyp (inverted jellyfish) form in life cycle Radial symmetry Mostly marine, some fresh water

Phylum Platyhelminthes (flatworms) Examples: Planaria, Tapeworm, Tubellarians, Flukes

Phylum Platyhelminthes Approx. 19 000 species Free-living in marine or fresh water, or parasitic Body flattened dorsoventrally Mouth only

Phylum Nematoda (roundworms) Examples: Hookworm, pinworm, Trichinella

Phylum Nematoda Approx. 20 000+ species Cylindrical, slender, tapered at either end Free-living or parasitic

Phylum Annelida (segmented worms) Examples: Earthworms, leeches, polychaetes

Phylum Annelida Approx. 12 000+ species Segmented body Terrestrial and aquatic Mouth and anus

Phylum Mollusca Examples: Snails, clams, squids

Phylum Mollusca Approx. 100 000+ species Muscular foot Shell present in many forms All habitats

Phylum Arthropoda Examples: Insects, crab, mites, ticks, spiders, centipedes

Phylum Arthropoda Approx. 1 000 000+ species Segmented body, some segments may be fused Jointed appendages External skeleton

Phylum Echinodermata Examples: Starfish, Sea Cucumbers, Sea Urchins

Phylum Echinodermata Approx. 7 000 species Adults have pentamerous (five-sided) radial symmetry marine

Vertebrates Have backbones 1 main Phyla Only 5% of animals belong to this group, including us

Phylum Chordata Examples: Fish, amphibians, reptiles, birds, mammals

Phylum Chordata Approx. 7 000 species Notochord (flexible rod shaped body of embryo) at some time in life history Bilateral symmetry