Joke Collection Website - Mood Talk - Briefly describe the structure of bird eggs and the functions of each part, and talk about the structure of bird eggs.
Briefly describe the structure of bird eggs and the functions of each part, and talk about the structure of bird eggs.
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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