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Arthropods

Arthropods. An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs. There are four main kinds of arthropods. 1. Crustaceans. 3. Centipedes & Millipedes. 2. Spiders & Scorpions Ticks & Mites. 4. Insects. Arthropods.

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Arthropods

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  1. Arthropods An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs. There are four main kinds of arthropods. 1. Crustaceans 3. Centipedes & Millipedes 2. Spiders & Scorpions Ticks & Mites 4. Insects

  2. Arthropods There are more than 1 million kinds of arthropods on Earth. There are three characteristics that all arthropods have. 1. exoskeleton 2. segmented body 3. jointed legs

  3. exoskeleton. All arthropods have an An exoskeleton is a hard, outer covering.

  4. Some arthropods grow too big for their exoskeletons. molt. These arthropods will Molting is to leave an exoskeleton and grow a new one.

  5. More Characteristics of Arthropods Arthropods have segmented bodies. Arthropods have jointed legs. Arthropods have a heart to pump blood through their bodies. Arthropods reproduce sexually.

  6. Crustacean A crustacean is an arthropod that has a hard, exoskeleton, two pairs of antennae, and a mouth for crunching and grinding. Crustaceans are ... Crabs Lobsters Barnacles Shrimp

  7. Crustaceans Crustaceans can _____________ certain parts of their body. re-grow stone crab A ___________ can re-grow its claws. Most crustaceans live in ____________ and get oxygen from the water through _________. water gills Gills are special respiratory organs that help some animals breathe and get oxygen from the water.

  8. What is Entomology? The study of insects (and their near relatives). What are insects (and near relatives)? Insects and their relatives are ARTHROPODS.

  9. Insects

  10. What is an insect? 3 body parts head thorax abdomen

  11. What is an insect? compound eyes

  12. What is an insect? two antenna

  13. What is an insect? exoskeleton

  14. What is an insect? 6 legs

  15. Class Arachnida 4 Orders - Spiders Araneae Scorpions Scorpionida Daddy Long legs Opiliones Ticks and Mites Arcarina

  16. Characterisitics of spiders ( Order Araneae ) 6 pairs of appendages 4 pairs of walking legs 1 pr. of chelicera ( most anterior head appendage) 1 pr. of pedipalps no antennae no segmentation head-chest fused to form cephalothorax breathe with book lungs or trachea poison glands with fangs ( on the chelicera )

  17. Tarantula molting

  18. Trapdoor spider

  19. Black and Yellow Argiope (Garden Spider )

  20. Brown recluse spider Violin shape on dorsal side

  21. Female Black Widow Spider

  22. Order Scorpionidae - segementation prominent

  23. Order Opiliones - feed more as scavengers Harvestmen – Daddy Long legs

  24. Order Arcarina Adult female deer tick

  25. Cutting proboscis in mouth of tick

  26. Female dog tick

  27. Classes of Myriapods (many legged arthropods) (all have one pair of antennae, a head region, and trunk with many pairs of legs, use trachea) • Diplopoda - millipedes • Chilopoda - centipedes

  28. Myriapods [one pair of antennae, head & trunk regions, trunk with many pairs of legs] Millipede (Diplopoda) Two pair of legs per visible segment, attached under body. Centipede (Chilopoda) Pair of fangs under head, one pair legs per visible segment - attached to side of body. No fangs, no eyes, legs attached to side of body.

  29. Millipede (Diplopoda) Centipede (Chilopoda) Garden centipede

  30. Classes of Crustacea • mostly marine, fresh water, a few terrestrial • all have two pair of antennae • five or more pairs of legs • segmented abdominal appendages • head & trunk or cephalothorax & abdomen body arrangement • have gills • Sowbugs or pillbugs • Sand fleas • Barnacles • Crabs, lobster, shrimp

  31. Crayfish cephalothorax (Decapoda) Sowbug (Isopoda), a terrestrial crustacean

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