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a large class of arthropods including spiders and ticks and scorpions and daddy longlegs


class of mandibulate arthropods including: lobsters


arthropods having the body composed of numerous double somites each with two pairs of legs: millipedes


arthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes


typical adults have one pair of antennae, three pairs of legs and three distinct body regions - many possess wings


pair of mouthparts in chelicerates that contain fangs and are used to stab and paralyze prey


pair of mouthparts in chelicerates that are usually modified to grab prey


enable crayfish to taste and hold food.




An organ of anthropods used to sense sound- ear like


the appendage on a crayfish that aids in swimming

tracheal system

A gas exchange system of branched, chitin-lined tubes that infiltrate the body and carry oxygen directly to cells in insects.

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