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Phylum Arthropoda

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Phylum Arthropoda What animals are arthropods? Trilobites (Extinct!) Part of Paleozoic marine ecosystems Bodies divided into 3 long vertical lobes with many legs Most ... – PowerPoint PPT presentation

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Title: Phylum Arthropoda


1
Phylum Arthropoda
2
(No Transcript)
3
What animals are arthropods?
Trilobites (Extinct!)
  • Part of Paleozoic
  • marine ecosystems
  • Bodies divided into
  • 3 long vertical lobes
  • with many legs
  • Most were
  • bottom feeders.

4
Crustaceans
5
  • Found in oceans, freshwater streams and
  • some on land.
  • Diverse group range from huge king
  • crab to microscopic copepods and oyster-like
  • barnacles

6
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7
Chelicerates
8
  • Share a set of specialized dagger like mouth
  • parts used for tearing their food.

9
Insects
10
  • 80 of all known species
  • Most are terrestrial
  • Have 6 legs

11
Myriapods Centipedes and Millipedes
  • Long bodies
  • Many pairs of legs

12
Shongololo giant millipede found in Southern
Africa From Zulu and Xhosa means to roll up
13
Characteristics
  • Exoskeleton made of chitin
  • Jointed appendages can have 6, 8, 10 or
  • even 100s. Used for walking, swimming,
  • sensing, manupilating food, chewing

14
  • Charactertics (continue..)
  • Segmentation

15
  • Arthropods must shed exoskeleton molting
  • Process has steps
  • New layer of cuticle secreted underneath
  • exoskeleton.
  • Enzymes are secreted to digest and weaken
  • old cuticle.
  • New exoskeleton is filled with fluid, takes
  • time to harden.

http//shapeoflife.org/video/behavior/arthropods-b
lue-crab-molting
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