1. Phylum Arthropoda

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

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

4. Characteristics
c. Jointed Appendages

5. 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

6. Characteristics 2. Level of Organization = organ system 3. Symmetry =
Bilateral

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

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

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

10. Grasshopper Respiratory System

11. Spider Respiration- book lungs

12. Respiration – Crustaceans Gills

13. 6. Internal Transport
Open Circulatory System

14. Spider Internal Transport
(red) = Heart and blood vessels

15. Bibliography
Grasshopper Internal Transport 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