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Name: christoper
Status: student
Age: 11
Location: N/A
Country: N/A
Date: 12/16/2004
Question:
Why does an egg have a membrane under the shell?

Replies:
Blood vessels run through this membrane, allowing blood to circulate directly under the shell. This allows gas exchange to occur. Basically, it helps the embryo to get oxygen and release other gases. The membrane also serves as a a repository for waste products that come from the embryo.

G. Fields

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