Definition for Chorion
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Revision as of 20:42, 28 February 2011 by Bio man (Talk | contribs) (Created page with "An extraembryonic membrane in the amniotic egg that, along with the allantois, exchanges gases between the embryo and the surrounding air.")
An extraembryonic membrane in the amniotic egg that, along with the allantois, exchanges gases between the embryo and the surrounding air.