Animal Kingdom Invertebrates Tour of the Invertebrate Organisms of the Animal Kingdom

Invertebrates Are Animals Animal Characteristics Eukaryotic Heterotrophic Multicellular, specialized cells Lack Cell Walls Reproduce, sexual and asexual Respond to environment Motile, muscles

Specifics to Invertebrates Characterized by No Backbone! Other means of structure Exoskeleton, Spicules, Shells, Pin, Hydrostatics Invertebrate Fun Facts 95% of all animal species Sizes range from microscopic to 20 meters

Classifying Invertebrates Body Symmetry Cephalization Level Body Plan Layers of Tissue Early Development – Protostome or Deuterostome

Major Groups Crustacea Platyhelminthes Annelida Porifera Cnidaria Insecta Mollusca Nematoda Echinodermata http://school.discovery.com/clipart/ , http://clipart.usscouts.org

Things to Consider Level of Classification Phylum or Class Common name examples for each sea star Type of Symmetry bilateral Type of Body Plan acoelomate, coelomate Development of systems Circulatory Movement

Examples- Common names Invert Tour Title-Invert Tour- Animals without a backbone. They share the LACK of a trait. Purpose- Observe and gather information to compare/contrast Invert groups. Observations and Notes- Class or Phylum name Examples- Common names Type of symmetry Type of Body plan systems R a n k

Conclusion-Reference chapters 26-29 Dragonfly Which invert groups do you believe are the LEAST complex? WHY? Which invert groups do you believe are the MOST complex? WHY? 3. List your evolutionary ranking from LEAST to MOST complex. 1. 2. 3. 4. 5. 6. 7. 8. 9. 4. How does YOUR RANKING compare to the BOOK model? (pgs 747-749) Explain in detail your ranking differences and similarities.