2. Biology I Study Guide Worms FlatwormsRoundworms Segmented Worms

3. Flatworms are members of the Phylum Platyhelminthes Planaria and Tapeworms are members of this phylum Flatworms are animals Flatworms have 3 layers of tissues - the ectoderm (outer layer that gives rise to nervous tissue and skin) the endoderm (inner layer which gives rise to the gut lining) the mesoderm (middle layer which gives rise to muscle, reproductive organs, and circulatory vessels) Flatworms have bilateral symmetry Flatworms exhibit cephalization (they have a distinct head region) Flatworms have internal organs Flatworms are acoelomate - they are solid and have no body cavity Flatworms are protostomes Flatworm Study Guide Flatworm Quiz

4. 1. Flatworms have 2 layers of tissues. Flatworm Quiz Back 2. Flatworms have a mouth and anus. 3. Flatworms belong to Phylum Nematoda. 4. Flat worms have radial symmetry. 5. Most flatworms are coelomates. 6. Flatworms belong to the Kingdom Animalia 7. Flatworms are protostomes. 8. Flatworms are segmented. 9. Platyhelminthes have internal organs. 10. Flatworms are sessile. True False True False True False True False True False True False True False True False True False True False

5. Roundworms are members of the Phylum Nematoda Roundworms are animals Roundworms have 3 layers of tissues - The ectoderm (gives rise to nervous tissue and skin) The endoderm (gives rise to the gut lining) The mesoderm (gives rise to muscle, reproductive organs, and circulatory vessels) Roundworms have both a mouth and an anus Roundworms are pseudocoelomates (the body cavity lies between the mesoderm and the endoderm) Roundworms have bilateral symmetry Roundworms reproduce sexually Many roundworms are parasitic Roundworm Study Guide Roundworm Quiz

6. 1. Roundworms have 2 layers of tissues. Roundworm Quiz Back 2. Roundworms have a mouth and anus. 3. Roundworms belong to Phylum Nematoda. 4. Roundworms have radial symmetry. 5. Most roundworms are coelomates. 6. Roundworms belong to the Kingdom Animalia. 7. Roundworms are protostomes. 8. Roundworms are segmented. 9. Nematoda have internal organs. 10. Roundworms are sessile. True False True False True False True False True False True False True False True False True False True False

7. Segmented worms belong to the Phylum Annelida. Segmented worms have 3 layers of tissues - the ectoderm (gives rise to nervous tissue and skin) the endoderm (gives rise to the gut lining) the mesoderm (gives rise to muscle, reproductive organs, and circulatory vessels) Earthworms are examples of segmented worms. Annelida are protostomes. Annelida have both a mouth and an anus. Annelida exhibit cephalization. Annelida are coelomates (have a body cavity that lies within the mesoderm). Annelida exhibit bilateral symmetry. Segmented worms are animals. Leeches are parasitic annelids. Most annelids reproduce sexually Segmented Worm Study Guide Segmented Worms Quiz

8. 1. Annelids have 2 layers of tissues. Segmented Worm Quiz Back 2. Earthworms have a mouth and anus. 3. Earthworms belong to Phylum Nematoda. 4. Annelids have radial symmetry. 5. Most annelids are coelomates. 6. Leeches belong to the Kingdom Animalia 7. Annelids are protostomes. 8. Annelids are segmented. 9. Annelids have internal organs. 10. Some annelids help aerate and fertilize the soil. True False True False True False True False True False True False True False True False True False True False