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词汇 Chorioallantoic membrane
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Chorioallantoic membrane

英语百科

Chorioallantoic membrane

The chorioallantoic membrane — also called the chorioallantois or abbreviated to CAM — is a vascular membrane found in eggs of some amniotes, such as birds and reptiles. It is formed by the fusion of the mesodermal layers of two developmental structures: the allantois and the chorion. In mammals, this structure forms the placenta.

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