Chorioallantoic membrane
The chorioallantoic membrane (CAM), also known as the chorioallantois, is a highly vascularized membrane found in the eggs of certain amniotes like birds and reptiles. It is formed by the fusion of the mesodermal layers of two extra-embryonic membranes – the chorion and the allantois. It is the avian homologue of the mammalian placenta. It is the outermost extra-embryonic membrane which lines the non-vascular egg shell membrane.
| Chorioallantoic membrane | |
|---|---|
The chorioallantoic membrane of a developing chick covered with Smallpox virus pocks | |
| Identifiers | |
| MeSH | D049033 |
| Anatomical terminology | |
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