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copyright cmassengale

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Presentation on theme: "copyright cmassengale"— Presentation transcript:

1 copyright cmassengale
Invertebrates copyright cmassengale

2 Invertebrate Phyla Sponges Cnidarians Platyhelminthes Nematodes
Mollusks Annelids Echinoderms Arthropods

3 Sponges (Porifera) Most primitive Cells relatively independent
Mostly marine No Symmetry

4 Cnidarians Jellyfish Hydra Coral Sea anemone Portuguese Man-O-War

5 Platyhelminthes Flatworms Bilateral symmetry Cephalization

6 Planarian – freshwater flatworm

7 Nematodes Tube-like digestive tract Roundworms! Mouth and anus
No segmentation

8 Mollusks Clams, snails, squids Varied habitats Marine Freshwater
Terrestrial

9 Annelids Segmented worms Common earthworm Leech

10 Arthropods Joint-legged animals External skeleton
Huge variation – mostly insects

11 Echinoderms Always marine Starfishes, sea urchins, sea lilies
Spiny skin

12 Brittle Star – An Echinoderm

13


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