Tags: Anatomical Structure, Embryology.
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.Three different layers compose the chorioallantoic membrane; these are called the chorionic epithelium the mesenchyme and the allantoic epithelium.
