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Eggshell, talk about it.
Eggshell: hard, with small holes, protective and airy.
Shell film: thin, double-layered, protective.
Air chamber: storing air and providing oxygen for embryo development.
Yolk membrane: protective effect.
Egg white: protection and nutrition of blastoderm.
Egg yolk: provides nutrition for embryo development.
Ligament: Fix the yolk.
Embryo disc: contains the nucleus and can develop into an embryo after fertilization.
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