Phylum Arthropoda.

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Presentation transcript:

Phylum Arthropoda

General Information Phylum: Arthropoda Examples: Insects Spiders Crustaceans Centipedes Millipedes Scorpions

Characteristics Body Structure a. Eucoelomate = fluid-filled body cavity, gut lined with peritoneum b. Segmentation (Metamerism) Tagmata = fused segments

Characteristics c. Jointed Appendages

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

Characteristics 4. Feeding Complete digestive tract Feeding Patterns: all types Herbivores Carnivores Filter feeders Predators

4. Feeding Specialized appendages E.g. Mouth parts (mandibles, probosci, etc.) Legs, pincers, chelicerae, pedipalps Antennae

5. Respiration a. Aquatic: Gills b. Terrestrial: Spiracles & Tracheae or Book Lungs

Grasshopper Respiratory System

Spider Respiration- book lungs

Respiration – Crustaceans Gills

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