Arthropoda Chelicerata
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  • 1. Arthropoda Chelicerata (Eight- legged Arthropods) By Sydney Furth & Brenna Banderob 5/19/09 pr. 3 Anoplodactylus evansi (no common name)
  • 2. Classification
    • Subphylum breaks into classes:
    • -Arachnida (arachnids)
    • -Merostomata (horseshoe crabs)
    • -Pycnogonida (sea spiders)
    Limulus polyphemus Horseshoe crab
  • 3. Physical Features
    • Exoskeleton
    • Jointed limbs
    • Segmented body
    • Well developed nervous system
    • Eight legs
    • No antennae
    • No distinct head
    Pseudopallene ambigua Yellow Pycnogonid
  • 4. Reproduction
    • Sexual reproduction
    • Produces eggs
    Spider eggs
  • 5. Feeding & Digestive System
    • Digestive system divided into 3 parts
    • -foregut
    • -midgut
    • -hindgut
    • carnivores
    • Sometimes eat other arthropods
  • 6. Circulatory System
    • Heart= long thin tube
    • Blood travels through open passages
    • Pale blood cells
    • - bluish
    • If skin broken- blood drains quickly
  • 7. Respiratory System
    • 2 breathing organs
    • -tracheae
    • -small tubes that carry air through body
    • -book lungs
    • -cavities in the abdomin
    • -air enters from slits on either side
  • 8. environment
    • land arthropods can be found any where on land
    • Water for horseshoe crabs & sea spiders (obviously)
    • -fresh and salt water
    Spider web
  • 9. Human Interactions
    • Most people go EEEKK at the sight of 8-legged arthropods
    • Many spider bites can cause problems, such as death
    • Scorpion & spider venom is used to make powerful medicines & vaccines
    A bite from this caused this Loxosceles reclusa Brown recluse spider
  • 10. Unique Features
    • Cold blooded
    • Most spiders have
    • week vision
    • Horseshoe crabs (who live in water) come ashore In large numbers to lay eggs
    • Horseshoe crabs swim upside-down
    Centruroides vittatus striped scorpion
  • 11. Examples
    • Tarantula movie
  • 12. Works Cited
    • Myers, P. 2001. Chelicerata . Animal Diversity Web. May 19, 2009. <http://animaldiversity. umnz.umich.edu/site/accounts/information /Chelicerata.html>
    • Holt, Rinehart, Winston. Animals. Austin, Texas: Harcourt Classroom Education Co., 2002
    • The Invertebrate Animals. May 20, 2009. <http://users.rcn.com/jkimball.ma.ultran et/BiologyPages/I/invertabrates.html>
    • Eisen, Stan. Arthropoda chericerata . May 21, 09. <http://www.cbu.edu/~seisen/Arthropoda/sld 014.htm>
  • 13.
    • Spiders . May 21,09. < http://www.greensmith s.com/spiders.html >
    • Thompson, ken. The bumble bee. May 20, 09. < http://www.bioteams.com/2006/04/2 1/the_social_networks.html>