| Chorioallantoic membrane | |
|---|---|
 The chorioallantoic membrane of a developing chick covered with Smallpox virus pocks | |
| Identifiers | |
| MeSH | D049033 |
| Anatomical terminology | |
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.[1] It is the avian homologue of the mammalian placenta. It is the outermost extra-embryonic membrane which lines the non-vascular egg shell membrane.
- ^ Gilbert SF (2003). Developmental biology (7th ed.). Sunderland, Mass.: Sinauer Associates. ISBN 0-87893-258-5. OCLC 51544170.