Invertebrate's

Porifera

Examples: Sponges

Means pore bearing

Sessile

Cnidaria

Cnidcytes: Cells that contain stinging

Two body forms: Polyp, Sessile

Radial Symmetry

Platyhelminthes

Examples: Flatworms, tapeworms

Many parasitic forms

Bilateral Symmetry

Mollusca

Examples: snails, clams, octopus, squid

Has Mantle

Has muscular foot/tentacles

Annelida

Examples: segmented worms, earth worms, leeches

Body divided into segments

Closed circulatory system

Arthropoda

Largest phylum

Paired, jointed appendages

Open circulatory system

Echinodermata

Comparing Invertebrates

Centipede and Millipedes

Most primitive arthropods

Two body regions: cephalothorax

Over 75% of all animal species

Phylum Echinodermata

Radial symmetry

Water vascular system