arthropod that lacks antennae and has four pair of walking legs & a pair of fanglike mouth parts
terrestrial chelicerate, such as a spider
respiratory organ that has several membranes that are arranged like the pages in a book
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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