1. Alisha Horst, Cecelia King, and Amber Plank

2. Referred to as segmented worms Found in deep marine sediments as well as common soils Split into three groups: polychaeta, oligochaeta (earthworms), and hirudinea (leeches) Polychaeta (live in almost all marine environments) is the bulk of the annelid group but the other two groups are most familiar for humans

3. Have three body regions Majority of the body is made of repeated sections called segments Examples: earthworms, leeches *activity – earthworm dissection

4. Worm Dissection

5. molluscus- Latin meaning soft Soft bodied with an internal or external shell

6. Four body parts Shell- made of calcium carbonate (CaCO3) secreted by glands in the mantle Mantle- thin tissue covering body. Secretes the shell Muscular foot- mouth and other feeding parts Visceral mass- internal organs located here Bilaterally symmetrical Have 1 or 2 shells Produce a trochophore (larva)

7. Respiration Aquatic mollusks: gills Land mollusks: mantle cavity lined with blood vessels, “skin breathing” Internal Transport Sessile and slow moving mollusks: open circulatory system- blood flows into internal body cavities Fast moving mollusks: closed circulatory system

8. Reproduction External fertilization Internal fertilization (mollusks with tentacles and some snails) Cross fertilization (snails that are hermaphrodites) Mollusk Video Clips

9. Mollusks Examples: Squid, Giant Clams, Octopus Vampire Squid *activity – squid labeling paper

10. Squid Labeling Key

11. Groups of animals include: Starfish, urchins, feather stars and sea cucumbers Sand Dollar Video

12. They are simple animals: They don’t have A brain Complex sensing organs Front or back end Head

13. They do have: Spiny skin 5 part radial symmetry Internal skeleton Central mouth Develop sharp spines for protection

14. They are found in a variety of shapes and colors. They cling to coral reefs around the world They live entirely in water

15. What it does: Feeding, movement, internal transport, respiration, and excretion Some of these animals are carnivorous, and feed and scavenge the ocean floor

16. All echinoderms move around with the use of thousands of tiny tube feet, many of which have suction cups on the ends

17. The most unusual feature to echinoderms is their water vascular system. It contains a network of fluid- filled canals connected to countless tube feet.