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PHYLUM MOLLUSCA 1. A) What does “gastropoda” mean? B) What examples shown belong to Class Gastropoda? C) Watch the video labeled “Gastropod”. Why is the name gastropod appropriate for these mollusks?

2. A) What does “bivalve” mean? B) What examples shown belong to Class Bivalvia? C) Watch the video labeled “Bivalvia”. Why is the name bivalve appropriate for these mollusks?

3. A) What does “cephalopoda” mean? B) What examples shown belong to Class Cephalopoda? C) Watch the video labeled “Cephalopod”. Why is the name cephalopoda appropriate for these mollusks?

4. What type of symmetry do all mollusks exhibit? 5. What other characteristics do all members of this phylum share?

PHYLUM ARTHROPODA 1. A) What does the name “arthropod” mean? B) Why is this name appropriate for these animals? 2. A) What examples shown belong to Class Insecta? B) How many legs and segments do the insects have? C) Draw one of the examples of this phylum. Label the head, thorax, abdomen, and legs.

3. A) What examples shown belong to Class Crustacea? B) How many legs and segments do the crustaceans have? C) Draw one of the examples of this phylum. Label the cephalothorax, abdomen, and legs.

Continue to the other side of the page 4. A) What examples shown belong to Class Arachnida? B) How many legs and segments do the arachnids have? C) Draw one of the examples of this phylum. Label the cephalothorax, abdomen, and legs.

5. What type of symmetry do all arthropods exhibit? 6. What is the exoskeleton of arthropods made of? Where else do we see this?

PHYLUM ECHINODERMATA Observe the dissected sea star. Use the diagram of the sea star to identify the parts labeled. 1. A) What does the name “echinoderm” mean? B) Why is this name appropriate for these animals?

2. What type of symmetry do these animals have as adults? 3. A) Identify the parts of the water vascular system on the sea star: madreporite, stone canal, ring canal, radial canal, and tube feet. B) Describe the pathway of the water vascular system.

C) What is the purpose of this system?

4. Observe the endoskeleton plates, called ossicles, on the inside of the sea star. What does “endoskeleton” mean? How does this compare to the mollusks and arthropods?

5. Observe the tube feet on the arm of the sea star. Locate the bulb-like top of a tube foot called the ampullae on the inside of the sea star. At the bottom of the tube foot on the outside of the sea star is the sucker. The two parts together work like a pipette. Describe how the tube foot allows movement in the sea star.