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General Information Phylum Arthropoda Characteristics Phylum: Arthropoda Examples: Insects Spiders Crustaceans Centipedes Millipedes Scorpions Characteristics c. Jointed Appendages 1. Body Structure a. Eucoelomate = fluidfluid-filled body cavity, gut lined with peritoneum b. Segmentation (Metamerism) Metamerism) Tagmata = fused segments Characteristics d. Exoskeleton with chitin Advantages 1) Protection 2) Place for muscle attachment Disadvantages 1) Have to molt to get bigger 2)During ecdysis (molting): cannot move, very vulnerable to predation Characteristics 2. Level of Organization = organ system 3. Symmetry = Bilateral 1 Characteristics 4. Feeding 5Complete digestive tract 5Feeding Patterns: all types ¾Herbivores ¾Carnivores ¾Filter feeders ¾Predators 5. Respiration 4. Feeding Specialized appendages E.g. Mouth parts (mandibles, probosci, probosci, etc.) Legs, pincers, chelicerae, pedipalps Antennae Grasshopper Respiratory System a. Aquatic: Gills b. Terrestrial: Spiracles & Tracheae or Book Lungs Spider Respiration- book lungs Respiration – Crustaceans Gills 2 6. Internal Transport Open Circulatory System Spider Internal Transport (red) = Heart and blood vessels Bibliography Grasshopper Internal Transport www.entomology.umn.edu/cues/4015/morpology/ 11/14/07 Spider Respiratory System homepage.ntlworld.com/spydawebb/anatomy.html 11/14/07 Spider Anatomy kentsimmons.uwinnipeg.ca/16cm05/1116/16anim5.htm 11/14/07 3
