Relating to or being an external skeleton, such as the hard outer covering of insects, crustaceans, and other arthropods.
From exo- 'outside' + skeletal (from skeleton, from Greek skeletos 'dried up, bare'). The term contrasts with endoskeleton (internal bone structure).
Exoskeletons are actually stronger per unit of weight than human bones, which is why insects can fall from buildings and survive—their external armor distributes force differently than our fragile internal scaffolding!
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