Biology Chapter 28

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Biology Chapter 28

• Arthropods

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• Classification
• Kingdom Animalia
• Phylum Arthropoda
• Subphyla Chelicerata
• Class Arachnida (spiders, scorpions, etc)
• Subphyla Mandibulata
• Class Crustacea (crayfish)
• Class Insecta (flies, ants, wasps, etc)

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• Phylum Arthropoda
• characteristics exoskeleton, molt (periodically
  shed), segmented bodies (like annelids but each
  segment is more specialized)
• cephalization more prominent than Annelids
• senses more specialized than Annelids
• open circulatory system

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• class Arachnida - spiders (all produce silk)
• poisonous NE spiders
• black widow
• brown recluse

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brown recluse range
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Day 3
Day 6

• Day 9

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• subphyla Mandibulata (have mandibles antenna)
• Class Crustacea (ex crayfish)
• external mandibles, maxillae, maxillipeds,
  chelipeds, swimmerets, uropod, telson, compound
  eye, carapace, cephalothorax, antenna
• internal esophagus, stomach, heart, brain,
  ventral nerve cord, ganglion, gills
• nervous system
• sense of balance

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