Name ____________________________

InvertebratesSTATION LAB

Key Characteristics used to organize animals1. Parazoa vs. Eumetazoa2. Radiata vs. Bilateria3. Diploblastic vs. Triploblastic4. Acoelomates vs. Pseudocoelomates vs. Coelomates5. Protostomes vs. Deuterostomes

MATERIALS: You will need a pencil / colored pencils, microscopes, slides, preserved specimens and your text and notes.

Phylum Porifera - Sponges

Vocabulary to know:spicule, osculum, choanocyte / collar cells

Questions:

1. What type of habitat does it live in?

2. What are the key evolutionary innovations of this phylum?

3. What is the importance of choanocyte / collar cells?

4. The two drawings below are external and internal views of a living sponge. Using the lines provided, identify by labeling: pore, spicule, choanocyte / collar cell, amoebocyte

26. Examine a prepared slide of Grantia (sponge) cross section. Draw what you see. Also, label the following on the picture to the right: incurrent pore, osculum, excurrent pore

Phylum Cnidaria - Jellyfish

Vocabulary to know: cnidocyte, nematocyst, medusa, polyp, tentacle, gastrovascular cavity / gastrodermis

Questions:

1. What type of habitat does it live in?

2. What are the key evolutionary innovations of this phylum?

3. What is the importance of nematocysts?

4. Describe and give an example of the differing body plans of cnidarians?

Observe the prepared specimens of Cnidarians. Examine the slide of Hydra under LOW POWER. Note the shape of the body plan. It has a hollow gastrovascular cavity which extends up to the mouth surrounded by tentacles.

6. In the space below, draw the lengthwise section of hydra.

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7. Draw a polyp and medusa body plan below.

Polyp Medusa

Phylum Platyhelminthes - Flatworms

Vocabulary to know:Flatworm, pharynx, hermaphrodites, proglottids, scolex,

Questions:

1. What are examples of flatworms?

2. Which flatworms are parasites? What does that mean?

3. Describe regeneration in flatworms.

4. The bodies of Platyhelminthes are acoelomate. In the space below, define what this term means:

5. Give three evolutionary advancements that flatworms provided for Kingdom Animalia:

6. Directions: Observe the prepared slides of flatwormsIn the space below, draw a picture of the prepared slide of Planaria. Label: Pharynx, eyespots

4Phylum Nematoda – Roundworms

Vocabulary: Cuticle, pseudocoelem

Questions:1. What are the key evolutionary innovations of this

phylum?

2. How do roundworms’ body cavities differ from all other animals’ body cavities?

3. What is the cuticle?

Phylum Annelida - Segmented Worms

Vocabulary: See figure labels.

1. The bodies of Annelida are coelomate. In the space below, define what this term means:

2. In the space below, describe how annelid worms move:

3. Name two characteristics that differentiate the phylum Annelida from Platyhelminthes (flatworms) and Nematoda (roundworms):

4. Label the diagram below with the following and define on your sheet: Body segments, Hearts, Setae, Brain, Mouth, Anus.

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Examine the cross section slide of Annelida.

5. In the space below, draw and label the digestive tract, coelem and epidermis (skin).

Phylum Mollusca

Vocabulary to know:Mantle, torsion, radula

Questions:1. What type of habitats does it live in?

2. What are the key evolutionary innovations of this phylum?

3. Describe and give an example of the three main classes of mollusks (Bivalvia, Gas-tropoda and Cephalopoda).

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4. What is a radula used for? How is it innovative?

Phylum Echinodermata

Vocabulary to know:Ossicle, water vascular system, tube feet

Questions:1. What type of habitat does it live in?

2. What are the key evolutionary innovations of this phylum?

3. Annelids/Arthropods have a central nervous systems with a brain. What kind of nervous system do echinoderms have and how does this allow for regeneration of lost limbs?

4. Name several distinguishing features of echinoderms.

5. Echinoderms are the first deuterostomes, what does this mean? How is it different from a protostome?

View the prepared cross section slide of the starfish limb. Label the tube foot, ossicle, coelem and digestive organ.

Phylum Arthropoda

Vocabulary:Arthropod, exoskeleton, molting, joint, metamorphosis, larvae, pupae

7Questions:

1. What type of habitat does it live in?

2. What are the key evolutionary innovations of this phy-lum?

3. Describe chelicerates (arachnids). How are they dif-ferent from insects?

4. Describe crustaceans. How are they different from insects?

5. Distinguish between millipedes and centipedes.

6. Contrast the life cycles incomplete metamorphosis and complete metamorphosis.

DON’T FORGET TO LOOK THROUGH THE MICROSCOPE!!!Choose one of the prepared slides and draw a picture in the space below. Label the organism, magnification level and at least TWO of the structures you see.