Unformatted text preview: -Molting: periods when arthropods shed exoskeletons, endocrine system, manufacturers bigger exoskeleton to take its place. Hide during molting.-Crustaceans: crabs, shrimps, lobsters. Two pairs of antennae, chewing mouth parts called mandibles. Have 3 body sections: head , thorax which lies behind head and houses organs, and abdomens. Sometimes head and thorax join to form cephalothorax.-Chelicerates: horseshoe crabs, spiders, ticks . have mouthparts called chelicerae. Four pairs of legs.Two classes: Merostoma (horseshoe crabs) and Arachnida(spiders). Spiders spin webs through spinnerets, organs that contain silk glands.-Uniramians: centipedes, melipedes and insects. Have jaws, one pair of antennae, unbranched appendages. Centipedes: one pair of legs per segment/carnivores. Millipedes: two pairs of legs per segment/detrivores....
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- Fall '11
- Biology, horseshoe crabs, Biology Campbell Textbook Notes, Biology Campbell Textbook, fewer body segments