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Unformatted text preview: food, dispose of wastes, form skeletal fibers, fight infections, and change into other cell types. Arachnid A member of a major arthropod group, the cheliceriforms. Arachnids include spiders, scorpions, ticks, and mites. Arthropod A segmented ecdysozoan with a hard exoskeleton and jointed appendages. Familiar examples include insects, spiders, millipedes, and crabs. book lung An organ of gas exchange in spiders, consisting of stacked plates contained in an internal chamber....
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- Spring '10