Arthropods presentation

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Arthropods presentation

  1. 1. Núria Forns Escola del Mar
  2. 2. Look at these animals. Can you find the odd one out? Frog http://recursos.cnice.mec.es/bancoimagenes4/ Spider http://recursos.cnice.mec.es/bancoimage nes4/ Ladybird http://recursos.cnice.mec.es/bancoimage nes4/
  3. 3. Answer these questions: Has the frog bilateral symmetry? Has the frog many pairs of limbs? Has the spider a segmented body? Has it jointed legs? Has the ladybird a hard exoskeleton? Has it bilateral symmetry?
  4. 4. Well done! The spider and the ladybird have: •Bilateral symmetry •Segmented body •Hard exoskeleton •Jointed legs •Many pairs of limbs Therefore, they are arthropods. Can you say the same about the frog?
  5. 5. Has the frog.. bilateral symmetry? segmented body? hard exoskeleton? jointed legs ? many pairs of limbs? http://recursos.cnice.mec.es/bancoimagenes4/ So, is the frog an arthropod? No, it is not. You are right. Brilliant!
  6. 6. Groups of arthropods There are four groups of arthropods: - Arachnids - Crustaceans - Insects - Myriapods Every group has got its own features. Let’s have a look!
  7. 7. Arachnids Observe these animals. What do they have in common? Their body has two parts: Cephalothorax Abdomen They haven’t got any antennae or wings. They’ve got 8 legs. They are mostly terrestrial. Spiders, scorpions, ticks and mites are arachnids. http://recursos.cnice.mec.es/bancoimagenes4 /
  8. 8. Crustaceans What do these animals have in common? Their body has two parts: Cephalothorax and abdomen. They’ve got four antennae. They’ve got ten or more legs. They are mostly aquatic, few terrestrial. Crabs, shrimps, lobsters are crustaceans. http://recursos.cnice.mec.es/bancoimagenes4/
  9. 9. Myriapods What do these animals have in common? Myriapods have : A clearly visible head with two antennae. A body with many segments. Centipede http://recursos.cnice.mec.es/bancoimagenes4/ In each segment there are two legs (centipedes)or four legs (millipedes) Centipedes and millipedes are myriapods. Millipede http://en.wikipedia.org/wiki/Image:Millipede.jpg
  10. 10. Insects Observe some virtual insects: http://www.ento.vt.edu/~sharov/3d/virtual.html As you can see most insects have: Three body parts: Head, thorax and abdomen. Six legs. Two or four wings and two antennae. Ants, bees, flies, grasshoppers, butterflies, beetles,.. are insects. To know more about insects we are going to visit this web: http://www.urbanext.uiuc.edu/insects/01.html

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