Invertebrates Flashcards

Phylum Porifera

Sponges

Phylum Cnidaria

Jellyfish and Relatives

Phylum Platyhelminthes

Tapeworms

Phylum Mollusca

Soft-bodied Animals

Phylum Annelida

Segmented Worms

Phylum Arthropoda

Jointed-foot Animals

Phylum Echinodermata

Spiny-skinned Animals

Phylum Porifera

Contain multiple cells but no true tissues

Phylum Porifera

Asymmetry

Phylum Cnidaria

Contain true tissues but no organs

Phylum Cnidaria

Radial symmetry throughout life

Phylum Cnidaria

Jellyfish, hydra, sea anemones, and corals

Phylum Platyhelminthes

Contain organs (no organ systems), bilateral symmetry (the first animals to have this trait), and no coelom

Phylum Platyhelminthes

Planaria, flukes, and tapeworms

Phylum Mollusca

The first animals to have a coelom

Phylum Mollusca

Bivalves, gastropods, and cephalopods

Phylum Annelida

The first animals to have segmentation

Phylum Annelida

Earthworms, spiny worms, and leeches

Phylum Arthropoda

Have an exoskeleton and legs

Phylum Arthropoda

Arachnids, centipedes, crustaceans, and insects

Phylum Echinodermata

The first animals to be deuterostomes

Phylum Echinodermata

Bilateral symmetry as larvae; radial symmetry as adults

Phylum Echinodermata

Sea stars, sea urchins, and sea cucumbers