the egg sac keeps the egg safe and pervides and it food for the
egg
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Ovarian follicle
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Charlotte laid eggs and made an egg sac to ensure that her legacy and friendship with Wilbur would continue after she died. The egg sac contained her offspring, which would eventually hatch and continue the cycle of life on the farm.
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The scientific name for an egg sac is "ootheca." It is a protective casing that contains eggs, commonly found in insects and some invertebrates.