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it's called an exoskeleton. it protects the spider from harm. as a spider grows, its exoskeleton will become to small for it, and it'll shed the exoskeleton. this process is called molting. you know when a spider (especially a tarantula, where it's very pronounced) is about to molt because the abdomen will start to glaze over. if it's a hairy spider, it'll look like it's balding on its abdomen.

exoskeleton

whoever wrote this its really very good

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16y ago

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