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Vocabulary Chapter 24 - A Closer Look at Arthropods Biology - 2010 Edition Holt McDougal

chelicerate

arthropod that lacks antennae and has four pair of walking legs & a pair of fanglike mouth parts

arachnid

terrestrial chelicerate, such as a spider

book lung

respiratory organ that has several membranes that are arranged like the pages in a book

spiracle

hole on the body of an insect's exoskeleton through which air can be taken in or released

trachea (plural: tracheae)

a system of thin branching tubes in the bodies of insects that allow for breathing

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