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Arthropods. Jointed-legged invertebrates. Arthropod Characteristics. Chitinous exoskeleton Paired-jointed appendages Growth with ecdysis (molting) Open circulatory system Complete digestive tract. Exoskeleton. Major reason for success! Provides Support Protection

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arthropods

Arthropods

Jointed-legged invertebrates

arthropod characteristics
Arthropod Characteristics
  • Chitinous exoskeleton
  • Paired-jointed appendages
  • Growth with ecdysis (molting)
  • Open circulatory system
  • Complete digestive tract
exoskeleton
Exoskeleton
  • Major reason for success!
  • Provides
    • Support
    • Protection
    • Prevention of dehydration
    • Sites for muscle attachment
metamorphosis
Metamorphosis
  • Change body form from immature (larval) stages to adult forms
  • Reduces competition between stages for
    • Food
    • Living space
taxonomy of arthropods
Taxonomy of Arthropods
  • 4 subphyla
    • Trilobitomorpha (all extinct)
    • Chelicerata
    • Crustacea
    • Uniramia
chelicerata
Chelicerata
  • Horseshoe crabs
  • Spiders
  • Mites
  • Ticks
  • Scorpions
crustacea
Crustacea
  • Shrimp, lobsters, crayfish
  • Fairy shrimp, brine shrimp
  • Water fleas
  • Barnacles
uniramia
Uniramia
  • Class Diplopoda (millipedes)
  • Class Chilopoda (centipedes)
  • Class Hexapoda (insects)
nervous system
Nervous System
  • Johnston’s organs (hearing - on antennae)
  • Tympanic organs (hearing – on legs or body)
  • Compound eyes (facets – ommatidia – fused)
  • Simple eyes (ocelli)
economic impact of arthropods
Economic Impact of Arthropods
  • Name one effect each major group has on mankind (good or bad).
  • For insects, list 4 good things that they do and 4 bad things that they are responsible for.