arthropoda chelicerata
TRANSCRIPT
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Arthropoda Chelicerata(Eight- legged Arthropods)
By Sydney Furth & Brenna Banderob
5/19/09pr. 3
Anoplodactylus evansi
(no common name)
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Classification
• Subphylum breaks into classes:
-Arachnida (arachnids)
-Merostomata (horseshoe
crabs)
-Pycnogonida (sea spiders)
Limulus
polyphemus
Horseshoe crab
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Physical Features
• Exoskeleton• Jointed limbs• Segmented body• Well developed
nervous system• Eight legs• No antennae• No distinct head
Pseudopallene ambigua
Yellow Pycnogonid
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Reproduction
• Sexual reproduction• Produces eggs
Spider eggs
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Feeding & Digestive System
• Digestive system divided into 3 parts
-foregut
-midgut
-hindgut• carnivores• Sometimes eat other
arthropods
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Circulatory System
• Heart= long thin tube• Blood travels through
open passages• Pale blood cells
- bluish• If skin broken- blood
drains quickly
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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
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environment
• land arthropods can be found any where on land
• Water for horseshoe crabs & sea spiders (obviously)
-fresh and salt water
Spider web
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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
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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 vittatusstriped scorpion
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Examples
• Tarantula movie
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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.ultranet/BiologyPages/I/invertabrates.html>
• Eisen, Stan. Arthropoda chericerata. May 21, 09.
<http://www.cbu.edu/~seisen/Arthropoda/sld014.htm>
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• Spiders. May 21,09. <http://www.greensmith s.com/spiders.html>
• Thompson, ken. The bumble bee. May 20, 09. <http://www.bioteams.com/2006/04/21/the_social_networks.html>