arthropods ch. 24. general characteristics  segmented bodies  jointed appendages  hard...

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  • ARTHROPODSCh. 24

  • General Characteristics Segmented bodiesJointed appendagesHard external skeleton (exoskeleton made of chitin)

  • General CharacteristicsMoltingOpen circulatory systemBrain with gangliaCompound eyes

  • General CharacteristicsSome aquatic arthropods have gillsTerrestrial arthropods have trachae (exchange CO2 and O2 change through holes called spiracles).

  • Examples of Arthropods560 million years oldCrustaceans- live in the oceanCrayfish, crabs, lobsters, barnaclesArachnidsSpiders, ticks, scorpians, mitesInsectsMyriapods- many legsCentipedes, millipedes

  • Extinct ArthropodsTrilobites

    Eurypterids**Horseshoe crabs are the only closest living relatives.

  • Review1) List 3 characteristics of arthropods that unite them as a single large group.2) Name 1 group of arthropod that is now extinct. Name at least 3 groups still in existence today.

  • INSECTS

  • Keys to Insect SuccessAbility to fly (1 or 2 pairs of wings)Diverse feeding habitsMany types of mouthparts

    Digestive enzymes to eat unusual food

  • Keys to Insect SuccessVideo clipMetamorphosis- body form changes from juvenile to adultLarva, pupa, adult

  • Impact of InsectsBees & flowersTermites & woodInsect Medicine?Diseases/ pestsEntomology- study and classification of insects

  • Insect CollectionSome Major Orders of Insects

  • Lubber Grasshopper Dissection

  • Grasshopper HeadCompound eyesSimple eyesMandiblePalpsAntennae

  • Grasshopper ThoraxTympannic membraneJumping legsWalking legs2 pairs of wings

  • Grasshopper AbdomenSpiraclesOvipositor (if female)

  • Grasshopper Internal Anatomy

  • Grasshopper Internal Anatomy

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